All flashcards
Flashcard 1: Which statement best describes cell types in a unicellular organism?
Answer: One cell type carries out all life processes. No specialization needed when there's only one cell.
Flashcard 2: What is the main advantage of being multicellular compared with being unicellular?
Answer: Specialized cells can perform different functions. Division of labor allows efficiency and complex structures.
Flashcard 3: Identify the correct pairing: unicellular or multicellular for a human.
Answer: Multicellular. Humans have trillions of specialized cells.
Flashcard 4: Which group is always unicellular: bacteria, plants, or animals?
Answer: Bacteria. All bacteria are single-celled prokaryotes.
Flashcard 5: Identify the correct pairing: unicellular or multicellular for a single-celled yeast.
Answer: Unicellular. Yeast is a single-celled fungus.
Flashcard 6: Which option best fits: A cell that contracts to move bones is a(n) cell.
Answer: Muscle cell. Specialized for contraction and movement.
Flashcard 7: Which option best fits: A cell that carries oxygen through blood is a(n) cell.
Answer: Red blood cell. Contains hemoglobin for oxygen transport.
Flashcard 8: What is the defining feature of a eukaryotic cell compared with a prokaryotic cell?
Answer: It has a nucleus and membrane-bound organelles. DNA is enclosed in nucleus; organelles compartmentalize functions.
Flashcard 9: What is the defining feature of a prokaryotic cell compared with a eukaryotic cell?
Answer: It lacks a nucleus and membrane-bound organelles. DNA floats freely in cytoplasm without membrane separation.
Flashcard 10: Which two major cell categories distinguish organisms such as bacteria from animals and plants?
Answer: Prokaryotic cells and eukaryotic cells. Basic cell structure differs between these groups.
Flashcard 11: Which statement best describes cell types in a multicellular organism?
Answer: Many specialized cell types share the work. Specialization allows complex functions and efficiency.
Flashcard 12: What is the term for a structure made of different tissues working together?
Answer: Organ. Examples include the heart (muscle and nerve tissues) and stomach.
Flashcard 13: What is the term for a group of organs working together to carry out major functions?
Answer: Organ system. Examples include the digestive system and circulatory system.
Flashcard 14: Identify the correct statement: cell specialization is more common in unicellular or multicellular organisms.
Answer: Multicellular organisms. Only multicellular organisms have enough cells to specialize.
Flashcard 15: What is the relationship between organism size and cell number in most multicellular organisms?
Answer: Larger organisms usually have more cells. More cells are needed to build bigger bodies, not bigger cells.
Flashcard 16: What is the term for the process in which cells become different types with different functions?
Answer: Cell differentiation. Stem cells differentiate into specialized cells during development.
Flashcard 17: Which option is correct for humans: one cell type or many specialized cell types?
Answer: Many specialized cell types. Humans have over 200 different cell types, including neurons and muscle cells.
Flashcard 18: Identify the best description of a bacterium: unicellular or multicellular organism?
Answer: Unicellular organism. Bacteria are single-celled microorganisms.
Flashcard 19: Identify the best description of most plants: unicellular or multicellular organisms?
Answer: Multicellular organisms. Plants have roots, stems, and leaves made of many cells.
Flashcard 20: Choose the word that completes the sequence: cells form tissues, tissues form , and organs form systems.
Answer: Organs. This is the hierarchy of organization in multicellular organisms.
Flashcard 21: Which option best explains why multicellular organisms can be more complex than unicellular organisms?
Answer: They have many specialized cell types and levels of organization. Specialization allows division of labor and complex structures.
Flashcard 22: What is the term for an organism made of exactly one cell?
Answer: Unicellular organism. The prefix 'uni-' means one, so unicellular means one-celled.
Flashcard 23: What is the term for an organism made of many cells?
Answer: Multicellular organism. The prefix 'multi-' means many, so multicellular means many-celled.
Flashcard 24: Which option best describes how cell type relates to function in multicellular organisms?
Answer: Different cell types have different functions. Structure determines function - nerve cells transmit, muscle cells contract.
Flashcard 25: Identify whether the organism is unicellular or multicellular: a yeast cell living independently.
Answer: Unicellular. Yeast can live and reproduce as individual cells.
Flashcard 26: Which level of organization is described: “a group of muscle cells working together”?
Answer: Tissue. Multiple cells of the same type form a tissue.
Flashcard 27: Which level of organization is described: “the stomach, made of multiple tissues”?
Answer: Organ. Organs contain different tissue types working together.
Flashcard 28: What is an organ system in a multicellular organism?
Answer: A group of organs working together. Like the digestive system with stomach, intestines, and liver.
Flashcard 29: Which option best explains why multicellular organisms can grow large: specialization and division of labor or one cell does everything?
Answer: Specialization and division of labor. Different cells handle specific tasks, enabling complex growth.
Flashcard 30: Choose the statement that is true about cell type variety: multicellular organisms have only one cell type or many cell types.
Answer: Many cell types. Complex organisms need diverse cells for different functions.