What is the best description of double fertilization in angiosperms?
A. One pollen grain fertilizes the embryo sac; the other sperm fertilizes the pollen grain.
B. One sperm fertilizes the egg, which develops into the embryo; the other sperm fertilizes the polar nuclei, which forms the seed coat.
C. One sperm fertilizes the egg, which develops into the embryo; the other sperm fertilizes the polar nuclei, which forms the endosperm.
D. One sperm fertilizes the egg, which develops into the embryo; the other sperm fertilizes the ovary, which becomes the fruit.
E. One sperm fertilizes the egg, which develops into the embryo; the other sperm produces the pollen tube.
Answer: C
You might also like to view...
The secretion of each of the hormones from the anterior pituitary requires ____
a. stimulation from the posterior pituitary b. that they first be secreted from the neurons of the hypothalamus c. one capillary bed d. positive feedback mechanisms e. the action of minute amounts of releasing hormones
Which of the following is true for Brachyura marine crabs?
A) Species richness decreases with increasing sea surface temperatures. B) Species richness decreases with NPP. C) Species richness decreases with latitude. D) Species richness decreases with time.
The phenetic system is based primarily on:
a. known evolutionary relationships. b. fossil evidence. c. the number of shared characteristics. d. the number of ancestral characteristics. e. both ancestral and shared characteristics.
transcription ends when RNA polymerase reaches a
What will be an ideal response?