- A simplified model shows a crab regrowing a damaged leg tip. Before: small molecules are shown inside the crab as separate pieces. During: arrows show the pieces joining into larger structures at the leg tip. After: the leg tip is restored, showing repair and growth of new tissue. The model states: "Rearranged molecules support growth and repair."
Which explanation best matches the model?
Answer: The crab regrows the leg tip because small molecules inside the crab are rearranged and assembled into larger structures that become new leg tissue.
The core skill is explaining molecular mechanisms for regrowth in crabs by assembling new leg tissue. Small molecules inside the crab are rearranged to form structures that restore the damaged leg tip. Models illustrate this with joining pieces at the site, combining repair and growth visuals. A strategy is to match explanations to model depictions of internal rearrangement, not external pulling. One misconception is that damaged parts regrow by stretching or energy replacement, but it requires molecular assembly. Matter is conserved, enabling crabs to rebuild using existing atoms. This facilitates robust growth and repair in crustaceans.
- A student studies the model of a lizard healing a cut. In the before part, many small molecule pieces are shown inside the lizard near the cut. Arrows show the small pieces being connected into longer chains and stacked layers that fill the cut. In the after part, the cut area is covered with new tissue. The model states: "Rearranged molecules support growth and repair."
Which explanation best matches the model and shows how molecules support repair while conserving matter?
Answer: The lizard's body rearranges small molecules into larger structures that become new tissue, so the cut is repaired without creating new matter.
The core concept in middle school life science is that molecules support the growth and repair of living organisms by providing the building blocks for new tissues. Small molecules, such as those from food, are rearranged inside the body to form the complex structures needed for healing processes like repairing a cut in a lizard. Models demonstrate this by using arrows to illustrate how small molecule pieces are connected into longer chains and stacked layers that fill in damaged areas and create new tissue. To check your understanding, count the small molecules in the before panel and ensure they match the components in the larger structures of the after panel, confirming no matter is created or destroyed. A common misconception is that healing occurs by generating new matter from nothing, but in reality, all new tissue comes from rearranging existing molecules. Conserved matter ensures that organisms can repair themselves efficiently without needing to produce matter anew. This principle of matter conservation supports both growth and repair across all living things, allowing for sustainable development and recovery.
- A student draws a model of a lizard healing after losing part of its tail. Before: inside the lizard are many small molecules (shown as separate dots). The model shows these small molecules being connected into longer chains and blocks (larger structures) at the injured tail area. After: the tail is repaired and the larger structures are now part of the tail tissue. The student writes, "Rearranged molecules support growth and repair."
Which explanation best matches the model and uses evidence from the before-and-after comparison to show how molecules support repair?
Answer: The tail repairs because small molecules inside the lizard are rearranged and joined into larger structures that become part of the new tail tissue.
The core skill is understanding how molecules support the growth and repair of living organisms, such as a lizard regrowing its tail. Small molecules inside the lizard, obtained from food and water, are rearranged and joined together to form larger molecules essential for building new tissues. Models typically illustrate this by showing separate small dots representing molecules being connected into chains or blocks that form larger structures at the site of repair. To check your understanding, compare the before-and-after parts of the model to ensure that the number of molecules is conserved and they are assembled into new tissue without appearing from nowhere. A common misconception is that repair happens through energy alone causing missing parts to appear magically, but actually, it requires assembling existing molecules into structured tissues. Because matter is conserved, the atoms from small molecules become integrated into the larger structures of the new tail without any matter being created or destroyed. This conservation of matter enables organisms like lizards to support growth and repair using resources from their environment.
- A model shows a snake healing a damaged scale. In the before panel, small molecules are shown inside the snake under the damaged scale. Arrows show those molecules being assembled into larger structures that replace the damaged area. In the after panel, the scale looks complete. The model states: "Rearranged molecules support growth and repair."
Which explanation best uses evidence from the model to show that repair is more than just a change in appearance?
Answer: Because the model shows small molecules being assembled into larger structures in the damaged area, it supports that new material is built to repair the scale.
The core concept in middle school life science is that molecules support the growth and repair of living organisms by providing the building blocks for new tissues. Small molecules, such as those from food, are rearranged inside the body to form the complex structures needed for repair processes like healing a damaged scale in a snake. Models demonstrate this by using arrows to illustrate how small molecule pieces are connected into longer chains and stacked layers that replace damaged areas. To check your understanding, count the small molecules in the before panel and ensure they match the components in the larger structures of the after panel, confirming no matter is created or destroyed. A common misconception is that repair is just a visual change without new material, but actually, it involves building from molecules. Conserved matter ensures that organisms can repair efficiently without needing to produce matter anew. This principle of matter conservation supports both growth and repair across all living things, allowing for sustainable development and recovery.
- A model shows a child's broken bone repairing. Before: the bone is cracked, and small molecules are shown inside the body. The model shows small molecules being assembled into larger structures at the crack. After: the crack is filled in with new bone tissue. The model includes: "Rearranged molecules support growth and repair."
Which evidence from the model best supports the idea that matter is conserved during repair (matter does not appear from nowhere or disappear)?
Answer: The model shows small molecules already inside the body being connected into larger structures that become part of the repaired bone.
The core skill is understanding how molecules support the growth and repair of living organisms, such as a child's bone healing after a break. Small molecules inside the body are rearranged and assembled into larger molecules that fill in and strengthen the cracked bone tissue. Models depict this by showing small molecules as dots being connected into larger structures at the fracture site, with before-and-after views highlighting the repair. To check your understanding, look for evidence in the model that matter is neither created nor destroyed, such as consistent molecule counts during assembly. A common misconception is that matter vanishes or appears during repair, but it is actually conserved through rearrangement into new forms. Since matter is conserved, the atoms in small molecules become integral to the larger bone structures without any net change in matter. This principle allows the body to support effective growth and repair in bones and other tissues.
- A model shows a salamander regrowing a leg. Before: the leg is missing and small molecules are shown inside the salamander. After: the leg has regrown and the model shows small molecules assembled into larger structures in the new leg. The model states: "Rearranged molecules support growth and repair." Which claim about the molecules during regrowth is incorrect?
Answer: The salamander's leg regrows because the body pulls ready-made leg parts from food without rearranging molecules.
This question tests identifying incorrect claims about molecular processes during regrowth. Small molecules are rearranged and assembled into larger structures that form new leg tissue during salamander regrowth. Models show this by depicting small molecules inside the salamander that later appear connected into larger structures forming the new leg. To find incorrect claims, look for statements suggesting ready-made parts or no molecular rearrangement. A common misconception is that organisms can pull complete body parts from food without molecular rearrangement. The correct understanding is that regrowth requires breaking down nutrients into small molecules, then rearranging these molecules into new structures. This process of molecular rearrangement supporting growth and repair while conserving matter is fundamental to all regeneration in living organisms.
- A simplified model shows a tree branch healing after a small break. Before: small molecules are shown inside the branch as separate pieces near the break. During: arrows show the pieces being assembled into a larger "support layer" that bridges the break. After: the branch is strengthened at the break, showing repair. The model states: "Rearranged molecules support growth and repair."
Which prediction about growth or repair is supported by the model if the tree has less access to small molecules (for example, during a long drought)?
Answer: Repair would be slower because fewer small molecules are available to rearrange into the larger support layer needed to strengthen the branch.
The core skill is predicting effects on tree branch repair when molecular access is limited, like in droughts. Small molecules in the branch are rearranged to form support layers bridging breaks. Models depict assembly with arrows creating larger structures for strengthening. Predict by considering model implications of molecule scarcity on repair speed. One misconception is that time alone heals without molecules, but building requires matter input. Conserved matter ensures trees use available atoms efficiently. This supports resilient growth and repair in plants under stress.
- A simplified model shows a puppy healing a small cut. Before: small molecules are shown inside the puppy as separate pieces near the cut. During: arrows show small pieces joining into larger strands and then forming a "new layer" over the cut. After: the cut is covered, showing repair. The model states: "Rearranged molecules support growth and repair."
Which claim about growth or repair is incorrect according to the model?
Answer: Repair happens because the body creates new matter from nothing at the cut site, so molecules do not need to be assembled.
The core skill involves learning how rearranged molecules facilitate repair in animals like puppies by constructing new tissue layers. Small molecules near a cut are rearranged to form strands and layers that cover and heal the wound. Models show this process with arrows indicating how separate pieces join into larger structures to bridge the damaged area. To verify, examine if the model conserves the number of molecular pieces from before to after the repair. A misconception is that bodies create new matter spontaneously for healing, but repair relies on rearranging existing molecules. Since matter is conserved, organisms must intake molecules to have materials for repair. This conservation mechanism enables effective growth and repair across various life forms.
- A model shows a plant stem thickening after being bent. Before: the stem is bent and has many small molecules shown inside the plant near the bend. After: the stem is stronger and has more stem tissue, and the model shows small molecules assembled into larger structures in that area. The model includes: "Rearranged molecules support growth and repair." Which explanation best matches the model?
Answer: Small molecules in the plant are rearranged and joined into larger structures that become additional stem tissue, strengthening the bend area.
The skill tested is explaining how molecules support growth through rearrangement into larger structures. Small molecules inside the plant are rearranged and joined together to build larger structures that become additional stem tissue. Models show this process by depicting small molecules near the bent area that later appear assembled into larger structures forming strengthened stem tissue. To identify the best explanation, look for descriptions showing molecules being rearranged into new tissue structures. A common misconception is that energy alone creates new tissue or that matter appears from nowhere during growth. The scientific principle is that existing small molecules are reorganized into new configurations that form plant tissues, conserving matter. This molecular rearrangement process supports all types of growth and repair in living organisms.
- A model shows a plant stem thickening after being bent. In the before panel, small molecules are shown inside the stem near the bend. Arrows show these small molecules being assembled into larger, stronger structures in the stem. In the after panel, the stem is thicker and the bend area is reinforced. The model states: "Rearranged molecules support growth and repair."
Which prediction is supported by the model if the plant cannot get enough small molecules to use inside the stem?
Answer: The stem would have less new structure built at the bend, so thickening and repair would be reduced.
The core concept in middle school life science is that molecules support the growth and repair of living organisms by providing the building blocks for new tissues. Small molecules, such as those from food, are rearranged inside the body to form the complex structures needed for processes like thickening a bent stem in a plant. Models demonstrate this by using arrows to illustrate how small molecule pieces are connected into longer chains and stacked layers that reinforce and build new tissue. To check your understanding, count the small molecules in the before panel and ensure they match the components in the larger structures of the after panel, confirming no matter is created or destroyed. A common misconception is that growth can occur without input molecules, but actually, they are required for building structures. Conserved matter ensures that organisms can grow and repair efficiently without needing to produce matter anew. This principle of matter conservation supports both growth and repair across all living things, allowing for sustainable development and recovery.
- A model shows a scraped knee healing. Before: there is a scrape and many small molecules are shown inside the body near the scrape. After: the skin is repaired, and the model shows those small molecules assembled into larger structures that make up repaired skin. The model states: "Rearranged molecules support growth and repair." Which claim about what happens to the molecules during repair is incorrect?
Answer: Repair happens because the scrape fills in with healing energy, so molecules are not part of the new skin.
The skill being assessed is identifying incorrect claims about how molecules support growth and repair. Small molecules are rearranged and assembled into larger structures that become part of repaired tissue, like new skin. Models illustrate this process by showing small molecules near an injury site that later appear connected into larger structures forming the repaired tissue. To find the incorrect claim, look for statements that contradict matter conservation or suggest repair happens without molecular rearrangement. A major misconception is that healing energy alone can create new tissue without using molecules. The scientific understanding is that repair requires rearranging existing molecules into new structures, conserving matter throughout the process. This principle of molecular rearrangement supporting repair applies to all healing processes in organisms.
- A model shows a young bird growing. In the before panel, small molecules are shown inside the bird's body. Arrows show these small molecules being linked and packed into thicker structures in the wing. In the after panel, the wing has more tissue than before. The model states: "Rearranged molecules support growth and repair."
Which evidence from the model supports the idea that growth happens by rearranging molecules into larger structures (not just getting bigger in size)?
Answer: The model uses arrows to show small molecules being assembled into larger structures that become additional wing tissue.
The core concept in middle school life science is that molecules support the growth and repair of living organisms by providing the building blocks for new tissues. Small molecules, such as those from food, are rearranged inside the body to form the complex structures needed for processes like wing growth in a young bird. Models demonstrate this by using arrows to illustrate how small molecule pieces are connected into longer chains and stacked layers that add tissue and enable expansion. To check your understanding, count the small molecules in the before panel and ensure they match the components in the larger structures of the after panel, confirming no matter is created or destroyed. A common misconception is that growth is just about increasing size without molecular changes, but actually, it involves building new structures from rearranged molecules. Conserved matter ensures that organisms can grow efficiently without needing to produce matter anew. This principle of matter conservation supports both growth and repair across all living things, allowing for sustainable development and recovery.
- A simplified model shows a fish growing. Before: small molecules are shown inside the fish as separate pieces. After: those pieces are shown connected into larger structures that make the body thicker in some areas, indicating growth. The model states: "Rearranged molecules support growth and repair."
What happens to molecules during growth, according to the model?
Answer: Small molecules are rearranged and assembled into larger structures that become part of the fish's body, so matter is conserved.
The core skill is comprehending that molecules drive growth in fish by being reorganized into body-enlarging structures. Small molecules inside the fish are rearranged to connect into thicker body sections, promoting overall growth. Models represent this by transitioning from scattered pieces to connected structures in after images, highlighting the building process. Check by ensuring the model shows no disappearance or creation of molecules, maintaining conservation. A misconception is that growth occurs by stretching without adding matter, but it requires assembling new molecular structures. Conserved matter allows fish to build upon existing atoms for expansion. This supports continuous growth and repair in aquatic organisms.
- A model shows a human healing a scrape on the knee. In the before panel, small molecules are shown inside the knee area. Arrows show the small molecules being assembled into larger structures that form a new covering over the scrape. In the after panel, the scrape is covered with new tissue. The model states: "Rearranged molecules support growth and repair."
Which claim about growth and repair is incorrect based on the model?
Answer: Repair happens mostly because the body has healing energy, and molecules are not needed to build the new covering.
The core concept in middle school life science is that molecules support the growth and repair of living organisms by providing the building blocks for new tissues. Small molecules, such as those from food, are rearranged inside the body to form the complex structures needed for healing processes like covering a scrape on a human knee. Models demonstrate this by using arrows to illustrate how small molecule pieces are connected into longer chains and stacked layers that form new coverings. To check your understanding, count the small molecules in the before panel and ensure they match the components in the larger structures of the after panel, confirming no matter is created or destroyed. A common misconception is that healing energy builds tissue without molecules, but actually, molecules are crucial. Conserved matter ensures that organisms can repair efficiently without needing to produce matter anew. This principle of matter conservation supports both growth and repair across all living things, allowing for sustainable development and recovery.
- A model of muscle growth after exercise shows small molecules inside the organism. Arrows show small molecules being assembled into larger structures in muscle tissue. Before: fewer larger structures are shown in the muscle. After: more larger structures are shown and the muscle tissue is repaired and grown. The model states: "Rearranged molecules support growth and repair."
What happens to molecules during this growth and repair, according to the model?
Answer: Small molecules are rearranged and joined into larger structures that become part of repaired and grown muscle tissue.
The core skill is understanding how molecules support the growth and repair of living organisms, such as muscles developing after exercise. Small molecules inside the body are rearranged and assembled into larger molecules that repair and enlarge muscle tissues. Models show this process with arrows connecting small molecule dots into bigger structures, comparing fewer to more structures before and after. To check your understanding, analyze what the model indicates happens to molecules during assembly, ensuring it aligns with building rather than conversion to energy. A common misconception is that energy directly becomes tissue without molecules, but growth requires rearranging them into structured forms. Since matter is conserved, atoms from small molecules integrate into larger ones without disappearing. This conservation principle supports muscle growth and repair in active organisms.
- A simplified model of a growing plant stem has two panels. Before: small molecules are shown inside the stem as separate dots. After: many of those dots are shown connected into larger blocks that make up a thicker stem section, showing growth. The model states: "Rearranged molecules support growth and repair."
Which evidence from the model best supports the idea that growth happens by rearranging molecules into larger structures?
Answer: The after panel shows more connected larger blocks in the stem than the before panel, indicating small molecules were assembled into bigger structures.
The core skill is recognizing that molecules enable growth in plants by being assembled into larger structural components. Small molecules absorbed by the plant are rearranged internally to form the complex molecules that thicken and elongate stems. Models depict this through before-and-after panels where dots connect into blocks, visually representing the building of larger structures for growth. A useful checking strategy is to compare the complexity of molecular arrangements in the model to confirm that growth involves assembly rather than just expansion. One misconception is that plants create matter from thin air, but they actually rearrange molecules from water, air, and soil. Conserved matter ensures that all new plant tissue comes from existing atoms. This principle supports sustained growth and repair in plants over time.
- A model of a growing puppy shows many small molecules inside the puppy. Arrows show small molecules being connected into larger structures in muscles and bones. Before: fewer larger structures are shown. After: more larger structures are shown as part of new tissue. The model includes the sentence: "Rearranged molecules support growth and repair."
Which prediction is supported by the model if the puppy does not get enough small molecules from its surroundings (for example, not enough food/water molecules entering the body)?
Answer: Growth and repair will slow down because there are fewer small molecules available to rearrange into the larger structures that make new tissue.
The core skill is understanding how molecules support the growth and repair of living organisms, such as a puppy developing muscles and bones. Small molecules inside the puppy, sourced from food and water, are rearranged and linked to form larger molecules that contribute to new tissues in growing areas. Models illustrate this by depicting small molecules as dots that are assembled into chains or structures, with arrows showing their integration into muscles and bones. To check your understanding, predict outcomes like slowed growth if molecule input decreases, and compare with the model's before-and-after depictions. A common misconception is that growth continues normally without new molecules, but it actually requires ongoing input to rearrange into tissues. Since matter is conserved, the atoms from ingested small molecules become part of the larger structures without disappearance or creation. This conserved matter principle enables animals like puppies to sustain growth and repair over time.
- A model shows a tadpole growing a longer tail. In the before panel, small molecules are shown inside the tadpole. Arrows show the molecules being assembled into larger structures in the tail region. In the after panel, the tail has more tissue. The model states: "Rearranged molecules support growth and repair."
Which statement is supported by the model about what happens to molecules during growth?
Answer: Small molecules are rearranged and built into larger structures that become new tail tissue, meaning molecules are reused as building material.
The core concept in middle school life science is that molecules support the growth and repair of living organisms by providing the building blocks for new tissues. Small molecules, such as those from food, are rearranged inside the body to form the complex structures needed for growth processes like lengthening a tail in a tadpole. Models demonstrate this by using arrows to illustrate how small molecule pieces are connected into longer chains and stacked layers that add tissue. To check your understanding, count the small molecules in the before panel and ensure they match the components in the larger structures of the after panel, confirming no matter is created or destroyed. A common misconception is that growth is just stretching existing tissue, but actually, it builds new structures from molecules. Conserved matter ensures that organisms can grow efficiently without needing to produce matter anew. This principle of matter conservation supports both growth and repair across all living things, allowing for sustainable development and recovery.
- A model of a fish shows fin regrowth after damage. Before: the fin is torn, and small molecules are shown inside the fish near the fin. After: the fin is repaired, and the model shows the small molecules connected into larger structures in the fin. The model states: "Rearranged molecules support growth and repair." Which prediction is supported if the fish does NOT have enough small molecules available inside its body during this time?
Answer: The fin repair will be limited because fewer small molecules can be rearranged and assembled into the larger structures needed for new fin tissue.
This question tests understanding how availability of small molecules affects growth and repair processes. Small molecules must be rearranged and assembled into larger structures to create new tissue during repair. Models show this by depicting small molecules being connected into larger structures that form repaired tissue. To make predictions, consider what happens when fewer building blocks (small molecules) are available for assembly. A common misconception is that growth and repair can occur without material input or that organisms can create matter from nothing. The correct understanding is that limited small molecules means limited building materials for repair, restricting how much new tissue can form. This demonstrates that matter conservation applies to all growth and repair - organisms need sufficient molecular building blocks.
- A model shows a young tree closing a small wound in its bark. In the before panel, small molecules are shown inside the tree near the wound. Arrows show the small molecules being assembled into larger structures that fill the wound. In the after panel, the wound is covered by new bark tissue. The model states: "Rearranged molecules support growth and repair."
Which prediction about growth and repair is supported if the tree has fewer small molecules available near the wound?
Answer: The wound would likely close more slowly or less completely because fewer small molecules could be assembled into the larger structures needed for new bark tissue.
The core concept in middle school life science is that molecules support the growth and repair of living organisms by providing the building blocks for new tissues. Small molecules, such as those from food, are rearranged inside the body to form the complex structures needed for healing processes like closing a wound in a tree's bark. Models demonstrate this by using arrows to illustrate how small molecule pieces are connected into longer chains and stacked layers that fill in wounds. To check your understanding, count the small molecules in the before panel and ensure they match the components in the larger structures of the after panel, confirming no matter is created or destroyed. A common misconception is that repair can happen without molecules as building materials, but they are essential. Conserved matter ensures that organisms can repair efficiently without needing to produce matter anew. This principle of matter conservation supports both growth and repair across all living things, allowing for sustainable development and recovery.
