Which of the following interactions is the molecular basis of muscle contraction?
A. Myosin and thick filaments.
B. Sarcomeres and T tubules.
C. Myosin and thin filaments.
D. Troponin and tropomyosin
Answer: C. Myosin and thin filaments.
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The plant hormone that coordinates the effects of other plant hormones during development of shoots and roots is
____.
a. auxin b. gibberellin c. cytokinin d. abscisic acid e. ethylene
Some herbivore-plant interactions evolved through a series of reciprocal evolutionary adaptations in both species. This process is called
A) herbivory. B) coevolution. C) selection. D) competition.
All of the following are signs of infectious diseases, except
A. fever. B. antibodies in serum. C. swollen lymph nodes. D. leucopenia. E. nausea.
What is the correct sequence of events in viral reproduction?
A. endocytosis, uncoating, maturation, and release B. attachment, penetration, biosynthesis, maturation and release C. penetration, attachment, integration, biosynthesis, maturation, release D. attachment, fusion, biosynthesis, maturation, and release