Which two systems in the human body are devoted exclusively to the regulation of organ function?
A. endocrine and circulatory systems
B. respiratory and circulatory systems
C. nervous and circulatory systems
D. nervous and endocrine systems
E. respiratory and nervous systems
D. nervous and endocrine systems
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Development of an animal is connected to the genes that are expressed during development. Researchers propose that ...
A. increases in the number of Hox genes have been instrumental in the evolution of many animal species. B. the greater the number of Hox genes the more complex the body plan of the animal. C. both BMP4 and Hox are associated only with digit development in animals. D. increases in the number of Hox genes have been instrumental in the evolution of many animal species and the greater the number of Hox genes the more complex the body plan of the animal are both correct. E. increases in the number of Hox genes have been instrumental in the evolution of many animal species, the greater the number of Hox genes the more complex the body plan of the animal, and both BMP4 and Hox are associated only with digit development in animals are all correct.
Gametophytes that are completely enclosed within the walls of a spore are known as:
A. endosperm B. endosporic gametophytes C. micropyles D. rosettes E. phragmoplasts
Four of the five answers listed below are used in descriptions of neuron membranes. Select the
exception. a. gate b. pump c. wave of depolarization d. channel e. synaptic cleft
All viruses use the host cell's nucleic acid polymerases for replication.
Answer the following statement true (T) or false (F)