A skeleton that relies on muscular force exerted against water is termed
A. a hydrostatic skeleton.
B. an endoskeleton.
C. an exoskeleton.
D. an ectoskeleton.
E. a hygroscopic skeleton.
A. a hydrostatic skeleton.
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Which of the following processes will occur in the presence or absence of oxygen?
A. glycolysis B. electron transport chain C. oxidative phosphorylation D. cellular respiration E. citric acid cycle
The theory of segregation
a. deals with the alleles governing two different traits. b. applies only to linked genes. c. applies only to sex-linked genes. d. explains the behavior of a pair of alleles during meiosis. e. applies only to autosomes.
Plants and algae most recently shared a common ancestor 480 million years ago, and plants colonized land shortly after that. Light, water, minerals, and dissolved gases surround the whole body of a submerged green alga, and buoyancy of water provides physical support. What part did plants evolve to absorb water and minerals on dry land?
A. stomata B. pollen C. vascular tissues D. cuticle E. lignin
A man comes to his physician complaining of drowsiness and a desire to sleep. He is suffering from tremors. He has just returned from central Africa. His physician believes that he may be suffering from a disease caused by Trypanosoma brucei, variety gambiense. If so, he has been bitten by a:
a. tsetse fly b. "kissing bug" c. mosquito d. tick