DPG (2,3?diphosphoglycerate) is produced when
a. carbon dioxide builds up.
b. oxygen levels are high.
c. tissues chronically receive too little oxygen.
d. bicarbonate ion is low.
e. sodium levels rise.
C
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Gene flow counters the effects of
a. natural selection. b. mutation. c. genetic drift. d. all of these. e. none of these.
The portion of the brain that receives sensory information from the skin and muscles is the
A. basal nuclei. B. primary somatosensory area C. processing center. D. auditory association area.
Cordgrass (Spartina alterniflora) can be found in different forms, such as tall in the low marsh environment and short in the high marsh environment. This response to environmental conditions is an example of genotypic plasticity
Indicate whether the statement is true or false
In which of the following kingdoms are fertilization and meiosis not part of the life cycle?
A. Animalia B. Protista C. Plantae D. Fungi E. Archaea