One Cell vs Many - Middle School Life Science
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Which evidence best distinguishes multicellular from colonial: shared tissues and organs or just grouped similar cells?
Which evidence best distinguishes multicellular from colonial: shared tissues and organs or just grouped similar cells?
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Shared tissues and organs. True multicellular organisms share resources between cells.
Shared tissues and organs. True multicellular organisms share resources between cells.
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Which option is a correct example of a multicellular organism commonly taught in middle school?
Which option is a correct example of a multicellular organism commonly taught in middle school?
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Human. Humans have trillions of specialized cells.
Human. Humans have trillions of specialized cells.
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Which option is a correct example of a unicellular organism commonly taught in middle school?
Which option is a correct example of a unicellular organism commonly taught in middle school?
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Bacterium. Bacteria are single-celled prokaryotes.
Bacterium. Bacteria are single-celled prokaryotes.
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Identify the evidence-based conclusion: a single cell swims, eats, and reproduces. What type is it?
Identify the evidence-based conclusion: a single cell swims, eats, and reproduces. What type is it?
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Unicellular. All functions in one cell indicates unicellularity.
Unicellular. All functions in one cell indicates unicellularity.
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Identify the evidence-based conclusion: an organism has muscle tissue and nerve tissue. What type is it?
Identify the evidence-based conclusion: an organism has muscle tissue and nerve tissue. What type is it?
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Multicellular. Tissue types prove cell specialization exists.
Multicellular. Tissue types prove cell specialization exists.
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Which type of organism commonly shows both sexual reproduction and asexual reproduction in its life cycle?
Which type of organism commonly shows both sexual reproduction and asexual reproduction in its life cycle?
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Multicellular organisms. Complex organisms have multiple reproductive strategies.
Multicellular organisms. Complex organisms have multiple reproductive strategies.
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What is the correct comparison of reproduction: which type commonly reproduces asexually by cell division?
What is the correct comparison of reproduction: which type commonly reproduces asexually by cell division?
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Unicellular organisms. Binary fission is simple cell division.
Unicellular organisms. Binary fission is simple cell division.
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Identify the correct statement about size limits: which type is usually smaller due to surface area limits?
Identify the correct statement about size limits: which type is usually smaller due to surface area limits?
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Unicellular organisms are usually smaller. Surface area limits single cell size.
Unicellular organisms are usually smaller. Surface area limits single cell size.
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Which evidence best supports that an organism is multicellular: specialized tissues or a single cell doing all tasks?
Which evidence best supports that an organism is multicellular: specialized tissues or a single cell doing all tasks?
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Specialized tissues. Different cell types indicate multicellularity.
Specialized tissues. Different cell types indicate multicellularity.
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What is the correct order of organization in multicellular organisms from simplest to most complex?
What is the correct order of organization in multicellular organisms from simplest to most complex?
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Cells → tissues → organs → organ systems → organism. Each level builds on the previous one.
Cells → tissues → organs → organ systems → organism. Each level builds on the previous one.
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Which level of organization is directly above cells in multicellular organisms?
Which level of organization is directly above cells in multicellular organisms?
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Tissues. Groups of similar cells form tissues.
Tissues. Groups of similar cells form tissues.
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What term describes different cell types working together in a multicellular organism?
What term describes different cell types working together in a multicellular organism?
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Division of labor (cell specialization). Specialized cells work together like a team.
Division of labor (cell specialization). Specialized cells work together like a team.
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Which type of organism shows specialization, where different cells do different jobs?
Which type of organism shows specialization, where different cells do different jobs?
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Multicellular organisms. Cell specialization increases efficiency and complexity.
Multicellular organisms. Cell specialization increases efficiency and complexity.
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Which type of organism has cells that must carry out all life processes within one cell?
Which type of organism has cells that must carry out all life processes within one cell?
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Unicellular organisms. No other cells exist to share the workload.
Unicellular organisms. No other cells exist to share the workload.
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What is the definition of a multicellular organism?
What is the definition of a multicellular organism?
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An organism made of many cells that often specialize for tasks. Multiple cells allow for division of labor and efficiency.
An organism made of many cells that often specialize for tasks. Multiple cells allow for division of labor and efficiency.
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What is the definition of a unicellular organism?
What is the definition of a unicellular organism?
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An organism made of one cell that performs all life functions. Single cells must be self-sufficient for survival.
An organism made of one cell that performs all life functions. Single cells must be self-sufficient for survival.
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Which evidence indicates cell communication is necessary: independent cells or coordinated organ systems?
Which evidence indicates cell communication is necessary: independent cells or coordinated organ systems?
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Coordinated organ systems. Systems require cell-to-cell communication.
Coordinated organ systems. Systems require cell-to-cell communication.
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What is the main reason many multicellular organisms need internal transport systems?
What is the main reason many multicellular organisms need internal transport systems?
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Many cells are far from the surface for diffusion to supply needs. Interior cells can't directly exchange with environment.
Many cells are far from the surface for diffusion to supply needs. Interior cells can't directly exchange with environment.
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Which type of organism typically relies mostly on diffusion across the cell membrane for exchange?
Which type of organism typically relies mostly on diffusion across the cell membrane for exchange?
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Unicellular organisms. Direct membrane contact with environment enables exchange.
Unicellular organisms. Direct membrane contact with environment enables exchange.
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What is homeostasis, and do both unicellular and multicellular organisms maintain it?
What is homeostasis, and do both unicellular and multicellular organisms maintain it?
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Stable internal conditions; both types maintain homeostasis. All organisms regulate their internal environment.
Stable internal conditions; both types maintain homeostasis. All organisms regulate their internal environment.
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Which key evidence shows an organism is unicellular when viewed under a microscope?
Which key evidence shows an organism is unicellular when viewed under a microscope?
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Only one cell is observed performing all life functions. No other cells are present to share life functions.
Only one cell is observed performing all life functions. No other cells are present to share life functions.
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What is the term for a group of similar cells working together in multicellular organisms?
What is the term for a group of similar cells working together in multicellular organisms?
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Tissue. Similar cells group together to perform a specific function.
Tissue. Similar cells group together to perform a specific function.
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Which evidence best supports that cells in an organism communicate: shared cytoplasm only, or signaling between cells?
Which evidence best supports that cells in an organism communicate: shared cytoplasm only, or signaling between cells?
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Signaling between cells. Cell-to-cell signaling allows coordination in multicellular organisms.
Signaling between cells. Cell-to-cell signaling allows coordination in multicellular organisms.
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Which statement correctly compares growth: unicellular grow by cell enlargement or by adding cells?
Which statement correctly compares growth: unicellular grow by cell enlargement or by adding cells?
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Unicellular: enlargement; multicellular: adding cells by division. Single cells grow bigger; multicellular organisms add more cells.
Unicellular: enlargement; multicellular: adding cells by division. Single cells grow bigger; multicellular organisms add more cells.
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What is a key advantage of multicellular organisms compared with unicellular organisms?
What is a key advantage of multicellular organisms compared with unicellular organisms?
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Division of labor through specialized cells increases efficiency. Specialized cells allow complex organisms to perform tasks better.
Division of labor through specialized cells increases efficiency. Specialized cells allow complex organisms to perform tasks better.
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