Answer:
D
Explanation:
The G2/M check point makes sure that <u>all of the chromosomes have been replicated.</u>
- <em>Is all DNA replicated?</em>
- <em>Is all DNA damage repaired?</em>
Answer:
Blood Brain Barrier(BBB)
Explanation:
This is a biological interface of special endothelial cells of astrocytes, pericytes , capillaries, neurons and other structures, acting as a physical barrier or gate separating the Central Nervous system from the peripheral blood circulations. Thus it formed a tight junction serving as a physical barrier to selectively regulate the entrance of substances from the cerebral blood flow into the brain, therefore maintaining homeostasis of the brain.
From above any substances absorbed into the blood stream irrespective of the mode of entry are transported through the BBB, and are selectively regulated to enter the brain cells by the BBB's interactions with the blood vessels, hormones etc.
Basically it allows the passage of nutrients, a few drug, hormones and resists certain toxins and pathogens for the brain homeostasis.
Answer:
C
Explanation:
accept but also do a research
Red giant or red supergaint (its the same thing)
In the
process of the nitrogen cycle.
<span>
The nitrogen cycle is a
biogeochemical succession process of nitrogen that involves: fixation,
ammonification, nitrification, and denitrification. Like any other
biogeochemical cycles. This process undergoes and affects the biological, geometrical
and chemical aspects in the ecosystem and the abiotic and biotic community. Hence,
the nitrogen cycle leads the abiotic component –nitrogen- to contribute to the
biotic community, decomposition and primal production. Further, it becomes an
essential part of the environment because some life components are contains it,
similarly, amino acids, nucleic acids in RNA and DNA. </span>
