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Questions and Answers
How did the invention of powerful electron microscopes impact the study of cells?
How did the invention of powerful electron microscopes impact the study of cells?
- They allowed scientists to create cells for the first time.
- They enabled scientists to learn more about cells than previously possible. (correct)
- They made it possible to see cells with the naked eye.
- They decreased the amount of information known about cells.
What is the fundamental concept of multicellularity among organisms?
What is the fundamental concept of multicellularity among organisms?
- Organisms relying on external sources for survival.
- Organisms consisting of a single cell that performs all life functions.
- Organisms consisting of multiple cells that work in isolation.
- Organisms consisting of many cells working together as a system. (correct)
Which of the following is a key characteristic shared by both plant and animal cells?
Which of the following is a key characteristic shared by both plant and animal cells?
- Chloroplasts
- Permanent vacuole
- Cell membrane (correct)
- Cellulose cell wall
What is the primary function of the nucleus within a cell?
What is the primary function of the nucleus within a cell?
Which cellular component is responsible for the production of energy through cellular respiration?
Which cellular component is responsible for the production of energy through cellular respiration?
What distinguishes unicellular organisms from multicellular organisms?
What distinguishes unicellular organisms from multicellular organisms?
Which of the following best describes the cytoplasm?
Which of the following best describes the cytoplasm?
What is the role of the cell membrane in a cell?
What is the role of the cell membrane in a cell?
In addition to the cell membrane, which additional structure is present in plant cells but not in animal cells?
In addition to the cell membrane, which additional structure is present in plant cells but not in animal cells?
Which of the following structures contains the chromosomes?
Which of the following structures contains the chromosomes?
What is the principal function of vacuoles in cells?
What is the principal function of vacuoles in cells?
Which of the following statements accurately describes the role of organelles?
Which of the following statements accurately describes the role of organelles?
How might the presence of chloroplasts affect a plant cell's function?
How might the presence of chloroplasts affect a plant cell's function?
What can be inferred about cells based on the statement that 'organisms are made up of simple units called cells'?
What can be inferred about cells based on the statement that 'organisms are made up of simple units called cells'?
If a cell lacks a cell wall and chloroplasts, how would it be classified?
If a cell lacks a cell wall and chloroplasts, how would it be classified?
Plant cells often have a relatively large vacuole compared to animal cells. What does this suggest about the difference in their functions?
Plant cells often have a relatively large vacuole compared to animal cells. What does this suggest about the difference in their functions?
How do cells group together to form living organisms?
How do cells group together to form living organisms?
A cell is observed under a microscope and found to contain a nucleus, cytoplasm, and cell membrane. Which of the following can be concluded about the cell?
A cell is observed under a microscope and found to contain a nucleus, cytoplasm, and cell membrane. Which of the following can be concluded about the cell?
If a scientist is studying how substances move into and out of cells, which cell structure is of most importance?
If a scientist is studying how substances move into and out of cells, which cell structure is of most importance?
From the description of plant and animal cells, what might be a consequence of a plant cell having a cellulose cell wall?
From the description of plant and animal cells, what might be a consequence of a plant cell having a cellulose cell wall?
Flashcards
What are cells?
What are cells?
The simple units that make up organisms.
What are unicellular organisms?
What are unicellular organisms?
Organisms consisting of one cell.
What are multicellular organisms?
What are multicellular organisms?
Organisms consisting of many cells that work as a system.
What is a cell?
What is a cell?
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What is the cell membrane?
What is the cell membrane?
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What is the cytoplasm?
What is the cytoplasm?
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What are organelles?
What are organelles?
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What is the nucleus?
What is the nucleus?
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What is the vacuole?
What is the vacuole?
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What are mitochondria?
What are mitochondria?
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What are chloroplasts?
What are chloroplasts?
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No cell wall?
No cell wall?
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No chloroplasts?
No chloroplasts?
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Study Notes
- Organisms are composed of cells, which are simple units.
- The invention of powerful electron microscopes in the 1930s allowed scientists to learn much more about cells.
- Cells function by: moving substances, grouping together, and performing specialised functions to form living organisms.
The structure of cells
- The cell is the basic unit of life.
- Unicellular organisms like bacteria and protozoa consist of one cell.
- Multicellular organisms consist of many cells that work as a system.
- Plant and animal cells are different, but share properties.
- Cells are covered by a cell membrane.
- The cytoplasm is the living part of the cell.
- Organelles are small structures found in the cytoplasm and are mostly too small to be seen without an electron microscope.
- The nucleus controls the working and function of the cell, and contains the chromosomes.
- The vacuole is an organelle with a membrane that holds liquid.
- The mitochondria are organelles that are responsible for cellular energy.
Animal cells
- Animal cells do not have a cell wall or chloroplasts.
- Animal cells are not rigid and can change shape.
- Animal cells often don't have vacuoles; when present, vacuoles re small.
Plant cells
- Plant cells are normally rectangular, and have a cellulose cell wall that encloses the cell.
- Plant cells have a large vacuole, which helps maintain their shape.
- Plant cells that are green contain chloroplasts and chlorophyll.
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