Our species, H. sapiens, derived from:

A. H. neanderthalensis.
B. H. floriensis.
C. H. ergaster/H. erectus.
D. H. habilis.
E. H. rudolfensis.


C

Biology & Microbiology

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________ is the term given to the process by which cells delete genes when the gene products are no longer required, as occurs in mammalian red blood cells.

Fill in the blank(s) with the appropriate word(s).

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Light that is absorbed by water is converted to:

a. short wave radiation. b. long wave radiation. c. heat. d. mass. e. green light.

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Pelagic organisms live:

a. in the water column. b. on the sediment. c. in the sediment. d. in hydrothermal vents. e. close to shore.

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Stomach motility

a. decreases following a heavy meal. b. moves chime through the pyloric sphincter. c. is unaffected by emotional state or external environmental factors. d. may be retarded when stretch receptors on the stomach wall are activated. e. is increased by hormones released in response to high stomach acidity

Biology & Microbiology