Question
Why is mitosis a longer and more complicated process of cell division than binary fission?(1 point)
Responses

Binary fission does not replicate DNA
Binary fission does not replicate DNA

Mitosis has check points that must be met to continue the cycle
Mitosis has check points that must be met to continue the cycle

Binary fission produces two identical daughter cells
Binary fission produces two identical daughter cells

Mitosis occurs in the cytoplasm and does not require a nucleus
Mitosis occurs in the cytoplasm and does not require a nucleus
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The correct response is:
Mitosis has checkpoints that must be met to continue the cycle.
Question
Some differentiated cells become senescent almost immediately, leaving the cell cycle and undergoing terminal differentiation. Other cells have a high need to proliferate in order to grow and repair the organ or tissue, so they do not enter senescence for a long period of time. Which cell type would be most likely to put off senescence and terminal differentiation so it could continue to replicate in order to grow and repair?(1 point)
Responses

brain cells
brain cells

skin cells
skin cells

lung cells
lung cells

heart cells
heart cells
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skin cells
When scientists and doctors are looking to heal wounds and cure diseases, stem cells are a great option because they can repair damage and grow new specialized cells. From the list, which type of stem cell would be the best option for healing the widest variety of diseases?(1 point)
Responses
skin stem cells
skin stem cells
embryonic stem cells
embryonic stem cells
small intestine stem cells
small intestine stem cells
bone marrow stem cells
bone marrow stem cells
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embryonic stem cells
What is the importance of microtubules in cell division?(1 point)
Responses
They start the process of cytokinesis.
They start the process of cytokinesis.
They organize and pull the chromosomes apart.
They organize and pull the chromosomes apart.
They reform the nucleus in the divided cell.
They reform the nucleus in the divided cell.
They provide a pathway for organelles to move into the newly formed cell.
They provide a pathway for organelles to move into the newly formed cell.
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They organize and pull the chromosomes apart.
Question
How is cell differentiation different than mitosis?(1 point)
Responses

Cell differentiation only occurs after a wound.
Cell differentiation only occurs after a wound.

Cell differentiation produces cells with different DNA.
Cell differentiation produces cells with different DNA.

Cell differentiation produces cells with different gene expressions.
Cell differentiation produces cells with different gene expressions.

Cell differentiation does not cause proliferation.
Cell differentiation does not cause proliferation.
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Cell differentiation produces cells with different gene expressions.
Raul has scraped his knee and noticed that after a week it had almost completely healed. Raul wondered how the skin was able to repair itself while looking exactly the same as his non-injured skin. In 3-5 sentences explain how mitosis plays a role in healing skin after injury and is able to maintain the look of the existing, non-injured skin.(4 points)
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