What characteristic would the R groups of amino acids have if they are located within the interior of biological membranes?
A. The R groups would be able to form ionic bonds.
B. The R groups would be polar.
C. The R groups would hydrophobic.
D. The R groups would be hydrophilic.
C
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Archaeopteris belongs to the now-extinct lineage of seedless vascular plants called ____, and is proposed to be the
possible ancestor of gymnosperms.
a. Charophyta b. Monilophyta c. Lycophyta d. proangiosperms e. progymnosperms
Which layer of the mammalian gut performs peristalsis?
a. mucosa b. muscularis c. serosa d. submucosa e. submucosa and muscularis
The autonomic subdivision of the vertebrate nervous system would innervate all but which of the
following? a. intestinal muscles b. skeletal muscles c. heart d. pancreas e. liver
Why does photorespiration reduce photosynthesis efficiency?
What will be an ideal response?