____ is produced by the ____, which influences biological rhythms and the onset of sleep
a. Cortisol; pineal gland
b. Melatonin; pituitary gland
c. Parathyroid hormone; parathyroid gland
d. Melatonin; pineal gland
e. Aldosterone; adrenal gland
D
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When several possible phylogenetic trees can be produced from a data set, the most parsimonious tree:
A. is the one that shows the smallest number of evolutionary changes. B. is the one that shows the largest number of nodes. C. is the one that shows the largest number of analogous characteristics. D. is the one that shows the smallest number of synapomorphies. E. is the one that shows the smallest number of branches.
True or false: in mammals, some genes are expressed differently depending on their parent of origin. This ensures that mammals develop from embryos with one maternal and one paternal genome
A. true B. false
Sea anemones have a(n) __________ that causes
them to extend into a feeding position when longitudinal cells __________ and radial cells __________. a. hydrostatic skeleton; contract; relax b. endoskeleton; contract; relax c. exoskeleton; contract; relax d. hydrostatic skeleton; relax; contract e. exoskeleton; relax; contract
Which of the following does not affect microbial nucleic acids?
A. Formaldehyde B. Ultraviolet light C. Ethylene dioxide D. Moist heat E. X rays