When a stem cell differentiates and changes in size and shape, specific genes are being (1 point)
spliced. expressed. copied. transcribed.
expressed.
Which of the following describes when the cell leaves the cell cycle and no longer divides? (1 point)
interphase senescence differentiation mitosis
senescence
Consider the three different types of stem cells. Each one’s ability to differentiate into new cells is slightly different. One type can differentiate into any cell, while another can only become specific cells. Select the answer that places the three types in the correct order, from widest range of differentiation to least able to differentiate (specific). (1 point)
totipotent, pluripotent, multipotent pluripotent, totipotent, multipotent pluripotent, multipotent, totipotent totipotent, multipotent, pluripotent
totipotent, pluripotent, multipotent
When treating leukemia, a cancer of the blood, doctors will often administer a bone marrow transplant to the patient. Why would a bone marrow transplant help treat cancer of the blood? (1 point)
Bone marrow makes stem cells that turn into various blood cells.
New bone marrow would replace the blood lost to the cancer.
New bone marrow would replace the bone marrow lost to the cancer.
Bone marrow makes cells that would attack and kill the cancer cells.
Bone marrow makes stem cells that turn into various blood cells.
Which of the following would be an environmental factor that
Item 1 Item 2 Item 3 Item 4 Item 5
could affect gene expression?
(1 point)
organ of the organism
sex of the organism
number of organisms in the group temperature of the water
temperature of the water
Analyze the impact of NAFTA on Mexican corn farmers. Why did so many Mexican corn farmers lose their livelihoods as a consequence of NAFTA? (1 point)
Manufacturing jobs that processed the corn left Mexico for the U.S. due to lower wages, reducing the need for Mexican-grown corn.
NAFTA gave subsidies to Mexican corn farmers to increase production, which flooded the market.
Mexican farmers could not compete with government- subsidized U.S. corn.
Changes in consumer food preferences from corn toward wheat reduced demand.