The endosperm of a plant ____
a. is the food supply for the new sporophyte plant
b. is composed of haploid tissue
c. protects the young embryo within a seed
d. provides a connection between the ovary of a flower and a developing seed
e. produces sperm cells
ANSWER: a
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The sum of all chemical reactions in a cell is referred to as ____
Fill in the blank with the appropriate word.
Which ion is actively transported to regulate pollen growth and fertilization?
a. hydrogen b. potassium c. sodium d. calcium e. magnesium
In phloem movement, ____ does not serve as a source
a. photosynthesizing cells in a leaf b. roots c. photosynthesizing cells in a stem d. food storage cells in a stem e. soil
In the absence of competition from other males:
a. Female chickens mated more often with the male present. b. The quantity of sperm a male used to inseminate a female decreased. c. Once a male has inseminated a female, additional sperm may do little to increase the probabil-ity of fertilization. d. Both B and C