<span>Well, there are five layers in the Earth's Atmosphere:
(In order from the inside out)
1) Troposphere
- This is where weather occurs.
2) Stratosphere
- This is the layer where jets fly, this is where jet-streams are found
3) Mesosphere
- Meso ("Middle") named because it is in the middle. This is where meteros burn up in the atmosphere.
4) Thermosphere
- Thermo ("Heat") Names because it is the hottest layer in the atmosphere. This is where the aurora borealis, or northern lights occur.
5) Exosphere
- Exo ("Outer") This is the outmost layer and it is where the atmosphere merges with outer space.</span>
Answer:
A. An area with low air pressure
Explanation:
The red "L" symbol is used to mark an area with a low pressure air system. A low air pressure system would cause thunderstorms, but the "L" does not mean that the area marked would cause a tornado.
Option A should be the correct answer.
Natural selection refers to the phenomenon by which the species in a population possessing the tendency to get adapted in a condition enhance in numbers in comparison to those who exhibit fewer adaptation capacities over a number of generations.
In other words, it can be stated as the non-random and differential development of distinct genotypes function to sustain favorable variant and to eradicate less favorable variants. Some of the conditions are required for the process of natural selection to take place.
These are heredity, reproduction, variation in individual characters, and variation in the fitness of organisms among the members of the population. If the conditions are met, then the phenomenon of natural selection occurs by default.
There are 56 neutrons. To find them, you just have to subtract the atomic number with the atomic mass. If you dont know, the atomic number is the number of protons (and electrons) in an atom. The atomic mass is the number of both the protons and neutrons. Of you subtract the atomic number, you get protons.
Activators and repressors are transcription-control elements that are found in eukaryotic organisms. These elements function during the process of transcription, where a DNA molecule is coded onto a RNA molecule for it to be sent to ribosomes outside of the nucleus and then polypeptide chains are produced from it.
The activators and repressors control which proteins are made, which means that they can either hinder or promote certain functions in the cells of the body. Therefore, even though all of the cells have the same set of DNA, some are able to produce HCl, while others produce other substances such as insulin.
