Enzymes are carried in the ________ of a sperm
Fill in the blank(s) with correct word
acrosome
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Among invertebrates, increased speed along the axon is brought about by increasing the
diameter of the axon. Among vertebrates, this same function (increased speed) is brought about by ____________________.
a. insulating the axons with myelin sheath cells b. increasing the number of pumps c. increasing the number of sodium gates d. making axon terminals larger
The function of chelicerae is similar to that of the __________ in crabs and lobsters
a. reproductive organs. b. antenna. c. mouthparts. d. claws.
Which of the following represents energy flow
in a grazing food web? a. producers >>> detritivores >>> decomposers b. producers >>> decomposers >>> detritivores c. producers >>> herbivores >>> decomposers >>> carnivores d. producers >>> herbivores >>> carnivores >>> decomposers e. producers >>> herbivores >>> detritivores >>> carnivores
This embryonic structure will become the embryo's part of the placenta
A) morula B) trophoblast C) zygote D) corona radiata