Heterospory refers to having
a. male and female gametes.
b. two spore types.
c. both male and female parts on the same plant.
d. separate male and female plants.
e. both sporophyte and gametophyte generations.
B
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What component determines the primary structure of a protein?
a. the number of hydrogen atoms b. the lipid profile c. the amino acid sequence d. the enzymes
Restriction enzymes
A) can cut only bacterial DNA. B) separate the strands of DNA during PCR. C) randomly cut DNA into small pieces. D) produce single-stranded DNA fragments with "sticky ends."
The chlorosomes of Chlorobia are attached to the plasma membrane by a lipid-derived baseplate.
Answer the following statement true (T) or false (F)
During fertilization in humans, _______________________
(a) a wave of Ca2+ ions is released in the fertilized egg's cytoplasm. (b) only one sperm binds to the unfertilized egg. (c) a sperm moves in a random fashion until it encounters an egg. (d) several sperm pronuclei compete in the cytoplasm to fuse with the egg nucleus.