What is it called when a single-celled zygote begins to develop by undergoing rapid cell division?
a. expansion
b. differentiation
c. cleavage
d. meiosis
c. cleavage
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If you add the plant hormone auxin to one side of a plant, the cells exposed to the auxin elongate. If you measured auxin levels in plant cells exposed to light, what you would you expect to find?
A. They would be lower, causing the plant to bend away from the light. B. They would be higher, causing the plant to bend away from the light. C. They would be higher, causing the plant to bend towards the light. D. They would be lower, causing the plant to bend towards the light.
You have type O blood (genotype ii). Who can you donate blood to in an emergency?
a. type O only b. type B only c. type A only d. type AB only e. types A, B, AB, and O
Acquired immunity allows for immunological memory in which lymphocytes respond to specific antigens during a lifetime. Another name for acquired immunity is
What will be an ideal response?
Which of the following represents a similarity between the evolution of tumors and the vertebrate immune response?
a. Both involve somatic mutations. b. Both involve sexual reproduction. c. Both can be examined using the Hardy–Weinberg principle. d. Genetic drift is negligible in both systems.