Question

directions: the diagram below shows six cells in various phases of the cell cycle. note the cells are not arranged in the order in which mitosis occurs and one of the phases of mitosis occurs twice. use the diagram to answer questions 1 - 7. phases of the cell cycle 1) cells a and f show an early and a late stage of the same phase of mitosis. what phase is it? 2) which cell is in metaphase? c 3) which cell is in the first phase of mitosis? a 4) in cell a, what structure is labeled x? spindle fibers 5) which cell is in the \in between\ phase of mitosis? 6) place the diagrams in order from first to last. 7) are the cells depicted plant or animal cells? explain your answer. 8) what is the longest phase of the cell cycle? 9) why is mitosis important?

Explanation:

1. Cells A and F show prophase as A has chromatin condensing and F has more - condensed chromosomes.
2. Cell C is in metaphase as chromosomes are aligned at the equator.
3. Cell A is in the first phase (prophase) of mitosis as chromatin is condensing.
4. In cell A, structure X is the centriole which helps in spindle - fiber formation in animal cells.
5. Cell D is in the interphase (the "in - between" phase) as it shows a distinct nucleus and normal cell activities.
6. The order is D (interphase), A (prophase), F (late prophase), C (metaphase), E (anaphase), B (telophase).
7. The cells are animal cells as there are centrioles (structure X in cell A) which are present in animal cells but not in plant cells.
8. The longest phase of the cell cycle is interphase where the cell grows, replicates DNA, and prepares for mitosis.
9. Mitosis is important for growth, repair of damaged tissues, and asexual reproduction in single - celled organisms.

Answer:

1. Prophase
2. C
3. A
4. Centriole
5. D
6. D, A, F, C, E, B
7. Animal cells because of centrioles
8. Interphase
9. For growth, tissue repair, and asexual reproduction