Answer:
Meiosis I, a reductional division of two haploid cells produces offspring cells that are not genetically identical with the event of recombination. Haploid girl cells have half the original/parent cell chromosomes.
Explanation:
meiosis II, an equational or mitotic division, divides the haploid cells created in meiosis I to produce four identical daughter cells that ultimately form the male/female gametes (egg/sperm).
Here chromatids split in contrast to meiosis I when homologous chromosomes apart.
water vapour stays in the atmosphere for a much shorter period of time. Water vapour will generally stay in the atmosphere for days (before precipitating out)
Answer:
d. secondary endosymbiosis.
Explanation:
- When a living cell acquires another organism that eventually becomes a part of this cell, this process is known as primary endosymbiosis.
- When an organism that has already undergone primary endosymbiosis engulfs another eukaryotic organism then this process is known as secondary endosymbiosis.
- Secondary endosymbiosis has been known to occur in plastids because of which they are surrounded by two membranes. This bilayer is present because one of the layers is the original outer membrane of the organism and the other membrane is that of the organism that has been engulfed.
Answer: Option D
Explanation:
The control of the non-crop vegetation is necessary in order to maintain the fertility of the soil.
The non crop vegetation should be cut in order to maintain the availability of the nutrients, water for the crop vegetation.
Example: The plant named eucalyptus has its roots deep inside the ground. So there is no other plant grown along with this plant because it will not get enough water for its growth.
Likewise the non crop vegetation should be stopped from growing to maintain the ecological balance.
The first line of defense. The nasal cavity.
