Answer:
Angiosperms have seeds with an 3n endosperm due to double fertilization.
Explanation:
- Double fertilization is found only in flowering plants.
- In angiosperms, the female gametophyte does not grow after reaching eight nucleate stage.
- After fertilization and triple fusion, the zygote and primary endosperm are created and further growth of embryo sac continues.
- Triple fusion is the fusion of two haploid polar nuclei of female gametophyte and one male nuclei. This results in a 3n nucleus.
- The developing embryo obtains nutrition from the endosperm.
- If fertilization fails no endosperm is formed.
The answer is genetic drift. This is the <span>change</span> of allelic frequency in a population due
to natural selection in <span>favor</span> of particular
traits. The effect of natural drift is <span>greater</span>
is a population of small size that in a big population. When the allelic
frequency of the isolated group of plants reaches 0, it is <span>deemed</span> as lost.
The cell will use Endocytosis
