Which antibodies are secreted when an allergic person is exposed to an allergen?
a. IgA
b. IgD
c. IgE
d. IgG
e. IgM
C
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What is the best definition of learning?
a. A conditioned response to a repetitive stimulus b. A long-term change in behavior due to experience c. A trial and error response to negative feedback d. The ability to ignore unwanted or irrelevant stimuli e. Communication with another member of a society for mutual benefit
Suppose that an organism has the same life strategy as a maple tree. When will the synaptonemal complex be observed?
a. only in a unicellular haploid phase b. in each generation c. only in a multicellular haploid phase d. only in alternating generations
All of the following animals are likely to undergo parthenogenesis EXCEPT
A. lizards. B. insects. C. humans. D. flatworms. E. fish.
Which hormone is secreted by the pancreas to lower high blood glucose levels?
A. adrenaline B. insulin C. glycogen D. glucagon E. antidiruetic hormone