A sexually reproducing animal that can produce both eggs and sperm and can switch from one sex to another is called
a____ hermaphrodite.
a. simultaneous
b. sequential
c. parthogenic
d. gastrulated
e. preferential
ANSWER: b
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If a scientist were studying the interaction of different proteins in the regulation of insulin secretion from a pancreatic cell, he or she would be studying
A. genomics. B. proteomics. C. cell biology. D. both genomics and proteomics. E. both proteomics and cell biology.
In photosynthesis, what is a photoact?
a. A photoact is a process where photons are harvested by antenna proteins for use in the reaction center. b. A photoact is a process by which water is split to harvest replacement electrons. c. A photoact is a process where two chlorophylls in the reaction center give up electrons, converting light energy to excited electrons. d. A photoact is a process that delivers photons to the reaction center.
The tough, fibrous sac that surrounds, protects and lubricates the heart is the
a. myocardium. b. epicardium. c. endocardium. d. pericardium. e. trabeculae carnae.
Both glycoproteins and proteoglycans contribute to the carbohydrate layer on the surface of the cell. Which of the following is not true of glycoproteins?
(a) They can be secreted into the extracellular environment. (b) They have only one transmembrane domain. (c) They have long carbohydrate chains. (d) They are recognized by lectins.