In angiosperms, a zygote and endosperm form as a result of
a. germination.
b. double fertilization.
c. pollination.
d. seed dispersal.
a. they are an important food source to surface-dwelling marine organisms.
b. they feed on tiny organisms living at the surface.
c. they require sunlight to carry out photosynthesis.
d. they cannot withstand the colder temperatures of deep water.