Animals are distinguished from other groups of eukaryotic organisms in that they (select all that apply):
A. are multicellular heterotrophs lacking cell
walls.
B. have embryos that include a gastrula
stage.
C. produce collagen.
D. are multicellular heterotrophs lacking cell
walls and have embryos that include a
gastrula stage.
E. move.
A,B,C,D
Biology & Microbiology
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a. mutation b. natural selection c. gene flow d. fertilization
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Focusing on an object requires the interaction of the ____ and the ____
a. ciliary muscles; lens b. ciliary muscles; cornea c. ciliary muscles; iris
d. iris; pupil e. cornea; pupil
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The ____ consists of a whorl of petals
a. calyx b. sepal c. corolla d. carpel e. stamen
Biology & Microbiology
As the human population size increases
Biology & Microbiology