By meiosis 4 gamets are produced four are functional in males amd only one in female in case of humans
The answer is; geographic position
A geographic position has no influence on the control of temperatures, but the rest of the choices do. Liquid nitrogen is used in some refrigerators to maintain very temperatures. Cloud cover influences temperatures with more clouds reflecting more sunlight back to space before reaching the earth’s surface. Ocean current carries warmth from the equatorial tropic to the poles maintaining a balanced global temperature.
Answer:
elimination of synthetic pesticides and fertilizers and other materials, such as hormones and antibiotics, yield is typically lower in an organic field than for a similar crop grown in a conventional or GM cropping system, use of biological control, crop rotations and other techniques to manage weeds, insects and diseases.
Explanation:
i did the usa test prep :)
Answer:
The correct answer is - Option B.
Explanation:
Before the Industrial Revolution, the light color moths were predominant so that they can blend in with the light-colored trees and lichens in their environment. After releasing coal smoke from factories, the trees became darkened, and the light-colored moths become an easy target for predator birds to spot.
Over time, the frequency of the dark moth increased due to they had a higher survival rate in habitats affected by the air pollution and it blends with darker coloration blended with the sooty trees. This is a shift in the population’s genetic variance toward the new, phenotype.
In graph B, light color moth frequency decreases, and after natural selection increases over time and after a decrease in evolution the dark color again decreases.