Immediately after an embryo forms, it begins to replicate new cells. What is the most likely type of cells that form during the first few divisions?(1 point)
Responses
oligopotent cells
oligopotent cells
pluripotent cells
pluripotent cells
multipotent cells
multipotent cells
totipotent cells
totipotent cells
Why is mitosis a longer and more complicated process of cell division than binary fission?(1 point)
Responses
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
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 does not replicate DNA
Mitosis has check points that must be met to continue the cycle
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
lung cells
lung cells
heart cells
heart cells
brain cells
brain cells
skin cells
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
small intestine stem cells
small intestine stem cells
embryonic stem cells
embryonic stem cells
bone marrow stem cells
bone marrow stem cells
skin stem cells
embryonic stem cells
What is the importance of microtubules in cell division?(1 point)
Responses
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 start the process of cytokinesis.
They start the process of cytokinesis.
They provide a pathway for organelles to move into the newly formed cell.
They organize and pull the chromosomes apart.
How is cell differentiation different than mitosis?(1 point)
Responses
Cell differentiation does not cause proliferation.
Cell differentiation does not cause proliferation.
Cell differentiation only occurs after a wound.
Cell differentiation only occurs after a wound.
Cell differentiation produces cells with different gene expressions.
Cell differentiation produces cells with different gene expressions.
Cell differentiation produces cells with different DNA.