<span>Origin of life developed from coecervates which are aggregates of lipid molecules that are glued together by electrostatic forces.chemisynthetic prokaryotes existed before the photosynthetic forms since the food others are feeding to do not exist yet.photosynthetic prokaryotes existed before aerobic eukaryotes since photosynthesis helps in the production of oxygen in the earth's atmosphere and the existence of aerobic organisms would not be possible.</span>
Cross-pollination, or when pollen from one plant fertilizes another plant of the same produces outcrossing or outbreeding.
Explanation:
Cross pollination is the transfer of pollen from a plant's stamen to a different plant's stigma of the same species. They produces stronger plants. For example only pollen from a daisy can pollinate another daisy.
They have male and female reproductive units on separate plant. If they are on the same plant he pollen will not fertilize the female reproductive unit on the plant.
This process needs four steps pollination, germination, penetration of the ovule and fertilization. The Zygote divides to form an embryo after fertilization.
Answer:
(i)
x= nucleus
y= chloroplasts
z= vacuole
(ii)
1) an animal cell does not contain a vacuole but a plant cell does
2) a plant cell contains chloroplasts but an animal cell does not
