In ____________________, one somatic cell is fused with an enucleated egg
Fill in the blank(s) with the appropriate word(s).
ANSWER: somatic cell nuclear transfer
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Define and explain the importance of the blood-brain barrier
What will be an ideal response?
Somatic mutations (mutations in the body of animals that are not transmitted via the germline to offspring) in immune system cells help long-lived organisms keep pace with fast-evolving pathogens
Does this observation support the red queen hypothesis? Briefly justify your answer. What will be an ideal response?
Answer the following statements true (T) or false (F)
1. One function of cell walls in plants is to prevent the continual increase in the expansion of the cell membrane. 2. The plant cell can move substances into cells using proton pumps that work against a gradient. 3. Diffusion of water across membranes occurs through channels formed by proteins known as aquaporins. 4. Active transport in plants works against a concentration gradient and this allows for substances to pass through plant cells without an energy input. 5. If your plants are wilted, this is an indication that the turgor pressure in cells of that plant are low.
Free radicals produced during biochemical reactions can serve as carcinogens if they are NOT neutralized by
A) mutator genes. B) growth factors. C) antioxidants. D) repair enzymes. E) proto-oncogenes.