Answer and Explanation:
The cell division cycle is responsible for increasing and maintaining cell number and size. This cycle is an essential feature of living organisms. There are four phases of cell division mitotic phase (M phase), growth phase 1 (G1), growth phase 2 (G2), and synthesis phase (S). One phase of the cell cycle ends, and the other starts; this is named a phase transition—a unidirectional alteration in the cell cycle phases. During G1, G2, and S phase cell grows and during the M phase cell divides. There are two models of cell reproduction as the clock model and the domino model. The domino model implies that cell division phases must occur in a distinct order and at a definite time. The domino model recommends that the cell cycle events are independent, while the clock model shows that the effectiveness of mitosis entrance was not persuaded by other actions.
Answer:
A. Photosynthesis
Explanation:
Photosynthesis is a process in plants produce food materials by absorbing carbondioxide from the atmosphere which decreases the concentration of carbondioxide in the atmosphere. In photosynthesis reaction, plant take water from the soil and carbondioxide from the atmosphere in the presence of sunlight produces glucose and oxygen. Glucose is stored in different parts of plant such as grains, stem and roots while oxygen is released in the atmosphere.
So, we know that a metamorphic rock is either an igneous or a sedimentary rock that are exposed to intense heat and pressure.
But when the metamorphic rock is thrusted deep underground through subduction, it will again be subjected to intense heat. This can cause it to melt, turning it into a magma. When the magma cools down, it again becomes an igneous rock and the rock cycle continues.
The outermost layer of the pleural membrane is the parietal pleura
Presence of a teratogen in the body of mother during pregnancy is responsible for mal growth of child or incomplete growth which may lead to abortion, still birth or even a defective child.
<h3><u>Explanation:</u></h3>
A teratogen is a substance that is known to cause <em>defects</em> in growth of child during the intrauterine growth period. Thalidomide was used as a morning sickness drug which relieved the vomiting nature of the would be mother. But the presence of thalidomide was responsible for less growth of limbs of the child. Alcohol in intrauterine life may cause Fetal Alcoholic Syndrome which damages the fetus' sense organs and neural cord.
The presence of a teratogen during the 1st trimester is more serious than in last trimester because the main formation of different organs and systems take place in the 1st trimester and maturity takes place in third trimester.
