Answer:
Gymnosperms are seed plants that have evolved cones to carry their ... Megaspores made in cones develop into the female gametophytes inside the ovules of ... ovule: the structure in a plant that develops into a seed after fertilization; the ... grain to initiate fertilization; the pollen grain divides into two sperm cells by mitosis; ...
Explanation:
Answer:
Microglial cell
Explanation:
The microglial cells are macrophages that are in the central nervous system (brain and spinal cord) protecting it. This cells will phagocytize damaged neurons as when a person has Alzheimer as well as agents that can cause a potential damage to the central nervous system such as the meningitis virus. When the Microglial cells phagocytize they absorb the damaged neuron or antigen and then they destroy it.
Answer:
True
Explanation:
This would be like a birth to death ratio. If you have more deaths than births your population would decrease. See a similarity?
Answer:
C) sex cells with half the original chromosome number.
Explanation:
As a result of fertilization, two haploid cells turn into one diploid cell.
Haploid cells = 1n
Diploid cells = 2n
1n + 1n = 2n