Emigration happens when individuals move outwords a population, while immigration happens when individuals move inwords a population.
Emigration : Emigration is the relocation or process of people leaving one country to reside in another. People emigrate for many reasons, include increasing one's chance of employment or improving quality of life.
Immigration : Immigration is the international movement of people to a destination country of which they are not natives or where they do not possess citizenship in order to settle as permanent residents or naturalized citizens.
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Answer:
a
Explanation:
Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population. If they are met, natural selection automatically results.
The operon is effectively the center of transcriptional control. In addition to its main structural genes, the operon houses an operator and a promoter. In front of the promoter lies a regulatory gene that produces repressor proteins. When a repressor is in its active state, it binds to the operator.
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Answer:
The correct answer is glycolysis, the citric acid cycle, and oxidative phosphorylation
Explanation:
Aerobic respiration contains three major processes that are glycolysis, the citric acid cycle, and oxidative phosphorylation.
In glycolysis, partial oxidation of one mole of glucose gives two moles of pyruvate and 2 NADH and 2 ATP. Then this pyruvate is converted into acetyl-CoA in the mitochondrial matrix(in eukaryotes) and acts as a fuel for the Krebs cycle.
In the Krebs cycle, acetyl CoA gives rise to 4 CO₂, 2 ATP, 6 NADH, and 2 FADH₂. So from glycolysis and Krebs cycle, only 4 ATP is produced and most of the energy remains in the form of NADH and FADH₂.
So in oxidative phosphorylation electrons are released from these molecules into machinery of oxidative phosphorylation to synthesize ATP.
The second stage takes place in the estogagus which leads to the stomach then the small intestine then the big intestine and then the toilet there
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