When an embryo partially splits after day 12 of development what arises?
a. fraternal twins
b. triplets
c. a fetus with extra limbs
d. conjoined twins
e. fetus in fetu
D
Biology & Microbiology
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Polar and charged molecules typically cross the cell membrane by way of ____
a. simple diffusion b. osmosis c. filtration d. active transport e. facilitated diffusion
Biology & Microbiology
Which of the following organisms employs a
contractile ring during cell division?
a. bears b. humans c. roses d. pigs e. more than one of these
Biology & Microbiology
Select the three layers of the human eye.
a. sclera b. choroid c. retina d. all of the above
Biology & Microbiology
Communities exist within populations which exist within ecosystems.
a. true b. false
Biology & Microbiology