The changes that were necessary to cope with the heavy energy demands of flight in birds include all of the following except
A. endothermy.
B. efficient circulation.
C. efficient respiration.
D. a three-chambered heart.
E. auxiliary air sacs and hollow bones.
Answer: D
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Select the diseases that are caused by apicomplexans.
A. Giardiasis B. Cryptosporidiosis C. Malaria D. Trypanosomiasis E. Lyme disease
The Casparian strip is associated with the
a. epidermis. b. vascular tissue. c. cortex. d. root hairs. e. endodermis.
What conclusions did Beadle and Tatum reach with their studies of Neurospora?
a. Each mutant gene affected three enzymes. b. Each mutant gene affected a pair of enzymes. c. Each mutant gene affected only one enzyme. d. Mutant genes had no effect on the enzymes produced by the cells. e. Each mutant gene affected as many enzymes as were present in a particular metabolic pathway
What is an assumption of group selection?
A. resource prediction B. no natural selection C. infanticide D. high rates of mutation E. lack of immigration