A new treatment for burns involves using skin biopsies to generate ____________________, which are sprayed onto
the burned area and form a new layer of skin. Fill in the blank(s) with the appropriate word(s).
skin stem cells
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Homologous chromosomes pair with each other during meiosis, but are misaligned. Which of the following is a possible outcome if crossing over occurs?
A. One daughter chromosome contains a gene duplication. B. One daughter chromosome contains a gene deletion. C. Two daughter chromosomes each contain a gene duplication. D. Two daughter chromosomes are normal. E. One daughter chromosome contains a gene duplication, one daughter chromosome contains a gene deletion, and two daughter chromosomes are normal.
What is the fate of the majority of the water in xylem sap?
a. It evaporates into the air. b. It is used to make sugars. c. It is used in capturing light energy. d. It becomes part of new plant cells.
A biology classmate seems confused by something he read at the professor's website about calcium imbalances and neurotoxins interfering with proper functioning of the muscular system–even to the point of causing death by suffocation. He states the
professor probably goofed up and meant the skeletal, nervous, and respiratory systems were adversely affected. Defend your professor's statements. What will be an ideal response?
The virus HIV, which causes AIDS, infects:
A) mast cells. B) T cells. C) B cells. D) phagocytes.