What is the function of the lymph nodes?
A) filer lymph
B) produce lymph
C) produce hormones
D) mature T cells
Answer: A) filer lymph
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Energy is important to life forms because
A) all life forms require a continuous supply of it. B) it is required to do work. C) it is required to make specific alterations in the cell. D) both choices A and B E) choices A, B, and C
A hormone binds a receptor and activates the cAMP signal transduction pathway ultimately leading to the cell response. If you wanted to develop a drug to block this pathway, the drug would need to inhibit _____
A. hormone release from the receptor. B. adenylyl cyclase. C. protein phosphatases remove phosphates from proteins initially activated by protein kinase A. D. GTP on the alpha subunit of the G protein being hydrolyzed to GDP. E. phosphodiesterase.
Lake ecosystems have many trophic levels
Indicate whether the statement is true or false.
The great adaptive radiation of hominoids in the Miocene is attributable to ____
a. the proliferation of complex forests b. an extended heating and drying trend c. the advent of bipedalism d. the evolution of a large brain e. changes in tooth structure