the cell theory
cells are the fundamental unit of life. study the images below.
images: human cheek cells, plant leaf cells, bacterial cells dividing, didinium capturing and eating paramecium, organelles inside paramecium, dividing plant cells
3. from the images above, come up with three statements to describe the main features that link cells and living things
(a)
(b)
(c)
4. for each of the cells listed below, use the matching image above to explain why the cell is prokaryotic or eukaryotic.
(a) human cheek cells:
(b) paramecium:
5. use your reasons from question 3 above to explain why each of the objects below is living or non living.
images: lichen, canary, panovirus, bacterium (e. coli), ammonia basil (likely typo)
(a) living:
reason:
(b) non-living:
reason:
6. what other features are used to classify life?

Question

the cell theory
cells are the fundamental unit of life. study the images below.
images: human cheek cells, plant leaf cells, bacterial cells dividing, didinium capturing and eating paramecium, organelles inside paramecium, dividing plant cells
3. from the images above, come up with three statements to describe the main features that link cells and living things
(a)
(b)
(c)
4. for each of the cells listed below, use the matching image above to explain why the cell is prokaryotic or eukaryotic.
(a) human cheek cells:
(b) paramecium:
5. use your reasons from question 3 above to explain why each of the objects below is living or non living.
images: lichen, canary, panovirus, bacterium (e. coli), ammonia basil (likely typo)
(a) living:
   reason:
(b) non-living:
   reason:
6. what other features are used to classify life?

Accepted Answer

### Question 3
# Brief Explanations:
To answer this, we analyze the images (human cheek, plant leaf, bacteria dividing, etc.) and recall cell theory and life characteristics.
- (a) All living things are composed of one or more cells (seen as images show different living organisms made of cells).
- (b) The cell is the basic unit of structure and function in living things (cells perform functions for the organism, e.g., cheek cells for protection, leaf cells for photosynthesis).
- (c) All cells come from pre - existing cells (images like bacteria dividing, plant cells dividing show cell division).
# Answer:
(a) All living things are composed of one or more cells.
(b) The cell is the basic unit of structure and function in living things.
(c) All cells come from pre - existing cells.

### Question 4 (a) - Human cheek cells
# Brief Explanations:
Eukaryotic cells have a nucleus and membrane - bound organelles. Human cheek cells (animal cells) have a distinct nucleus (visible in the image) and other membrane - bound organelles (like mitochondria, though not all may be visible, but the presence of a nucleus is a key indicator of eukaryotic cells). Prokaryotic cells lack a nucleus and membrane - bound organelles. So human cheek cells are eukaryotic because they have a nucleus and membrane - bound organelles.
# Answer:
Human cheek cells are eukaryotic. Reason: They have a nucleus and membrane - bound organelles (e.g., the nucleus is visible in the image of human cheek cells, and they are animal cells which are eukaryotic by definition as they possess a true nucleus and membrane - bound organelles).

### Question 4 (b) - Paramecium
# Brief Explanations:
Paramecium is a single - celled eukaryote. From the image “Organelles inside Paramecium”, we can see that it has a nucleus (and other membrane - bound organelles like contractile vacuoles). Prokaryotes lack a nucleus and membrane - bound organelles. So Paramecium is eukaryotic because it has a nucleus and membrane - bound organelles (visible in the image of its internal structure).
# Answer:
Paramecium is eukaryotic. Reason: The image of organelles inside Paramecium shows it has a nucleus and membrane - bound organelles (e.g., contractile vacuoles), which are characteristic of eukaryotic cells. Prokaryotic cells do not have these structures.

### Question 5 (a) - Living
# Brief Explanations:
Living things are made of cells, grow, reproduce, respond to stimuli, etc. Lichen (composed of fungal and algal cells), Canary (multicellular animal), Bacterium (E. coli, single - celled prokaryote), and Ammonite fossil? Wait, no, Ammonite is a fossil (non - living). Wait, the images: Lichen (living, made of cells, grows, reproduces), Canary (living, multicellular, performs life functions), Bacterium (E. coli, living, single - celled, reproduces, metabolizes). These are living because they are composed of cells (from cell theory), can grow, reproduce, and perform metabolic functions.
# Answer:
Living: Lichen, Canary, Bacterium (E. coli)
Reason: They are composed of cells (consistent with cell theory), can grow, reproduce, and carry out metabolic processes (e.g., Lichen grows on surfaces, Canary moves and respires, Bacterium reproduces by cell division).

### Question 5 (b) - Non - living
# Brief Explanations:
Panovirus (a virus) and Ammonite fossil. Viruses are not made of cells (they have a protein coat and genetic material but no cellular structure) and cannot carry out metabolic functions on their own. Ammonite fossil is the remains of a once - living organism, it does not have cells, cannot grow, reproduce, or perform metabolic functions. So Panovirus and Ammonite fossil are non - living.
# Answer:
Non - living: Panovirus, Ammonite fossil
Reason: Panovirus is a virus, which is not composed of cells and cannot carry out metabolic processes independently. Ammonite fossil is the remains of a dead organism, it lacks cells and cannot perform life functions (grow, reproduce, metabolize).

### Question 6
# Brief Explanations:
Other features to classify life include: ability to reproduce (sexual or asexual), ability to grow and develop, response to stimuli (e.g., plants growing towards light), metabolism (chemical reactions to obtain energy, like photosynthesis or cellular respiration), homeostasis (maintaining internal environment, e.g., human body temperature regulation), and having genetic material (DNA or RNA) that is passed on.
# Answer:
Other features used to classify life include: ability to reproduce (sexual or asexual), ability to grow and develop, response to stimuli, metabolism (to obtain and use energy), homeostasis (maintaining internal conditions), and possession of genetic material (DNA or RNA).

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QUESTION IMAGE

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Question 3

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Question 4 (a) - Human cheek cells