The difference between a drupe and a berry is that a drupe:a
is an accessory fruit, while a berry is a multiple fruit.
b. is formed from a single carpel, while a berry is formed from many carpels.
c. has a stony pit around a single seed, while a berry is fleshy throughout with many seeds.
d. is a dry fruit, while a berry is a fleshy one.
e. splits open along two sutures, while a berry splits open along one suture.
C
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Certain groups of cells move inward from the surface of the blastula in a carefully orchestrated migration called
A. blastulation B. archenteron formation C. morula formation D. gastrulation E. cleavage
When muscles contract, the opposing muscle
will
a. pull. b. push. c. contract. d. relax. e. shorten
Approximately what percent of the energy that
enters a trophic level becomes available to the next trophic level? a. 2 to 12 b. 3 to 13 c. 4 to 14 d. 5 to 15 e. 5 to 30
Which reaction has X and Y as reactants?
A) X + YZ ? Y + XZ B) XY + W ? WY + X C) XY ? X + Y D) X + Y ? XY E) XY + AB ? XB + AY