____ 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

Biology & Microbiology

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When several possible phylogenetic trees can be produced from a data set, the most parsimonious tree:

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Biology & Microbiology

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

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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

Biology & Microbiology

Which of the following does not affect microbial nucleic acids?

A. Formaldehyde B. Ultraviolet light C. Ethylene dioxide D. Moist heat E. X rays

Biology & Microbiology