Referring to the above diagram of the brain, B
identifies which region?
a. hypothalamus
b. thalamus
c. cerebrum
d. corpus callosum
e. cerebellum
A
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Compare and contrast chemical, spatial, and temporal gradients as found in bacterial regulatory systems
What will be an ideal response?
A muscle fiber contracts by a sequence of events initiated by the binding of acetylcholine to its receptor. Which of the following is the correct sequence?I - The calcium-troponin complex pulls tropomyosin away from the myosin-binding sites of actin.II - The freed-sites of actin bind to myosin to form cross-bridges.III - Calcium ion binds to the troponin.
A. I, II, and III B. III, II, and I C. I, III, and II D. II, III, and I E. III, I, and II
Which of the following is most directly associated with the theory of evolution?
a. Competition between members of a population for limited resources. b. Production of large numbers of offspring. c. Sexual reproduction producing variation in a population. d. Mutations changing the gene pool. e. Changing of populations over time.
Fish that retain their notochord
A) agnatha B) osteichthyes C) chondrichthyes D) crazyrivermonsterman