Nitrogen is fixed or combined, in nature as nitric oxide by lightning and ultraviolet rays, but more significant amounts of nitrogen are fixed as ammonia, nitrites, and nitrates by soil microorganisms.
Answer:
Development of the fetus to grow
oxygen for respiration. nutrients (food and water)
The developing fetus also needs its waste substances removing. The fetus is protected by the uterus and the amniotic fluid , a liquid contained in a bag called the amnion.
<u><em>Hope this helps!</em></u>
<h2>Mutation will occur </h2>
Explanation:
Base excision repair operates for small DNA damage such as deaminated bases
- DNA glycosylase plays an important role in cleavage of glycosidic bond of abnormal base (does not cleave phosphodiester bond)
- Uracil is incorrectly paired with guanine then mutation will occur
- The original GC base pair will change into AT base pair(transition of GC to AT)
- Transition is a mutation in which one purine(adenine or guanine) is substituted for other or one pyrimidine(cytosine or thymine or uracil) is substituted for other
Answer:
C
Explanation:
Interphase is the uniform phase for all cells division'. It signifies the begin of any cell cycle division. it is the period of prolong rest by the cells to prepare for the long journey of cell division. It involved replication of DNA, of organelles to be distributed in the daughter cells, accumulation of food resources .,
It is made up of the G1, for normal growth of cells and function of cells, doubling of organelles numbers.
S=synthesis stage, for DNA and genetic material replications
and the G2 phase growth resumption and preparation of cells division.
Therefore since all cells must undergo Interphase and carry out all the above processes prior to cell division, this stage(interphase) must be uniform to all cells.
Answer:
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