Oxpeckers are a type of small bird that land on zebras and eat ticks and other parasites that live on the zebra’s skin. The oxpeckers get food and the zebras get pests removed.
A. Mutualism
B. Commensalism
C. Parasitism
D. Predation
Answer: A. Mutualism
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Infectious hepatitis is caused by infection with hepatitis ________ virus
A) A B) B C) C D) E
Refer to Figure 45.8 in your textbook. Which of the statements below about foraging behavior is not correct?
A. Levels of for mRNA are significantly higher in foragers compared to nurses. B. cGMP and cAMP, cyclic nucleotides, were used as activators of cGMP-dependent protein kinase. C. cGMP but not cAMP was capable of activating kinase in nurse bees who then showed a significant increase in foraging behavior. D. cAMP was capable of activating a kinase that increased nurse bee behavior in foragers. E. The increase in nurse bee foraging was directly related to the dose of cGMP.
In chordates, which mesoderm structure forms during gastrulation and provides structural rigidity along the dorsal anterioposterior axis of the embryo?
A. Archenteron B. Neural tube C. Notochord D. Epidermis E. Intestinal tract
Ras proteins are of interest to researchers because ____
a. of their role in reproduction d. of their role in relieving cluster headaches b. of their role in liking plant hormones to germination e. of their role in bringing about the fight – or-flight response c. of their role in the development of many types of cancer