The large, productive udders of domesticated milk goats and cows are structures that have arisen through ________
Fill in the blank(s) with correct word
artificial selection
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If you gently bend your ear, and then let go, the shape of your ear will return because the cartilage of your ear contains_____
A) collagenous fibers B) elastic fibers C) reticular fibers D) adipose tissue E) loose connective tissue
The risk of having a baby with Down syndrome is associated with:
A. the age of the mother. B. the health of the mother. C. the socio-economic status of the mother. D. the IQ of the mother. E. All of the answer options are correct.
CAM and C4 have evolved multiple times in a range of vascular plants because __________. (Select all correct answer options.)
A. no novel enzymes or biochemical pathways are required B. C4 and CAM photosynthesis likely evolved from C3 ancestors C. gene expression changed D. land plants evolve rapidly
Continental drift caused the large supercontinent that existed during the Paleozoic era to separate into a northern
continent, called ____, and a southern continent, called ____.
a. Pangaea; Laurasia b. Laurasia; Gondwana
c. Gondwana; Laurasia d. Pangaea; Gondwana e. Gondwana; Pangaea