Answer:
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The carbon has multiple roles that contribute to the diversity of life on the Earth, with the two most important being that it is the most abundant greenhouse gas in the atmosphere, and that it is used by the plants for their functioning.
The carbon is the most responsible gas int he atmosphere that enables the existence of the Greenhouse effect. This gas manages to trap the heat into the atmosphere, thus making the Earth much warmer than what it would be without it. That warmth enables the life to exist, develop, evolve, diversify across the planet.
The carbon is also crucial for the survival of the plants because they use it in the process of photosynthesis to produce their own food. Without the carbon that would not be possible, thus the plants would not exist, and if the plants don't exist than there will be no animal life as well.
Answer:
B: The male cat is XY, while the female cat is XX, and the Y chromosome is
smaller than the X.
Explanation:
Y chromosomes are smaller than X chromosomes so the mass of DNA is smaller in male cells than female cells
D. Predators
Predators keep populations of other species in check. This was pretty clearly demonstrated in Yellowstone National Park after the wolves were eradicated there. The deer populations increased to the point that the aspen trees nearly disappeared due to the saplings' being eaten by deer. Since the reintroduction of wolves to the park, the aspen trees have begun to flourish once again.
Answer:
E) Improve membrane fluidity
Explanation:
Cholesterol constitutes the basic structural element of the skeleton of cell membranes. Without their reinforcement, the membranes would become extremely fluid and lose their consistency. Cholesterol is found in the esterified membranes in its hydroxyl group (OH): with fatty acids, mainly oleic and linoleic, or as cholesterol sulfate. The cholesterol-sulfate polar group is disposed on one of the faces of the membrane that interacts with other polar groups in that area, while its bulky hydrophobic portion is embedded between the apolar parts of the lipids that form the membrane skeleton and They fulfill many other functions, among which the reduction in the permeability of protons and sodium ions, and their participation in signal transmission. Cholesterol is also essential in phagocytosis processes carried out by cells to capture many nutrients and, in general, for the function of cleaning up organic waste produced by macrophages.
The membranes must have a fluid structure so that the integrated proteins can move "horizontally" to interact with their ligands and with other proteins. The fluidity is given by unsaturated fat. With the excess of saturated fat, the membranes become rigid, but only with the necessary unsaturated fat the membranes are extremely fluid and very sensitive to temperature changes. Cholesterol stabilizes the structure of the membranes; In order for them to have the correct structure, they must have the correct proportions of saturated, unsaturated fats and cholesterol. The membranes produced in the laboratory without cholesterol are unstable to temperature changes, drastically modifying their fluidity against the small temperature changes that occur in the physiological range.
In addition to its functions in cell membranes, cholesterol is an important product that metabolism uses as a raw material to make other compounds:
*Bile salts
*Sex hormones
*Hormones of the adrenal cortex (corticosteroids)
*Vitamin D (Calciferol)