Answer: c.Natural selection is the process by which organisms with more beneficial traits are more likely to survive and reproduce.
Natural selection is the differential survival and reproduction of individuals because of differences in the phenotype. Phenotypic characteristics favors the survival of some organisms in the population better than others. Example given by Darwin population of colored beetles green and red belonging to same species. Green ones mimic the color of grass not noticed by birds but red ones were noticed and eaten by birds. This is the selection by nature for better suited individuals. Green color gave the survival advantage to these beetles which is a phenotypic characteristic therefore, they will produce more offsprings than the red ones and also pass on the phenotypic trait to their offsprings.
Answer: A
Explanation:
Weather is short term climate is long term.
Answer: The nucleus
Explanation: It directs the cell's activities in the plant and animal cells.
Breathing into and out of a paper bag for a long period of time will lead to respiratory acidosis.
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What is respiratory acidosis?</h3>
- When the lungs are unable to expel all of the carbon dioxide the body produces, a condition known as respiratory acidosis develops.
- Body fluids, particularly the blood, become too acidic as a result.
- The main causes of respiratory acidosis are inadequate ventilation and carbon dioxide buildup.
- The main issue is an increase in arterial carbon dioxide partial pressure (pCO2) and a decline in the arterial bicarbonate to arterial pCO2 ratio, which causes a drop in blood pH.
- When there is acute respiratory acidosis, the body initially tries to make up for it.
- If the acidosis lasts more than 12 hours, a reaction known as metabolic compensation2 takes place.
- By increasing the release of hydrogen ions through ammonium, the kidneys will lower the blood's acidity.
- Too much carbon dioxide in the body can result in general symptoms including headache, exhaustion, and twitching muscles.
- Frequently, it goes away fast on its own.
- But in cases of severe hypercapnia, the body is unable to return to a stable CO2 level, and the symptoms are more severe.
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Answer:
NAD is a coenzyme found in all cells. It consists of two nucleotides linked through their phosphate groups with a nucleotide that contains an adenosine ring and another that contains nicotinamide.
Explanation:
In metabolism, NAD participates in oxidation reduction reactions. This coenzyme is found in two forms in the cells: NAD and NADH. NAD accepts electrons from other molecules and is reduced, forming NADH, which you can use as a reducing agent to donate electrons. These electron transfer reactions are the main function of the NAD.
In living organisms, NAD can be synthesized from scratch from the amino acids tryptophan or aspartic acid. Some NADs are found in nicotinamide adenine dinucleotide phosphate (NADP), whose chemistry is similar to NAD, although it has different functions in metabolism.
