A. True
"Charles Darwin is known as the father of evolution, but in fact Alfred Wallace, another British naturalist, was a co-discoverer of the theory- though Darwin got the most credit"
Movement<span> of tectonic plates or giant rock slabs that make up </span>Earth's<span> surface, lifts up. Eventually, erosion or people digging for </span>fossils<span> will </span>expose<span> the preserved remains. </span>Describe<span> three factors that encourage the formation of </span>fossil<span> formation</span><span>.</span>
Carbohydrates in size from smallest to largest is monosaccharide ( single sugar), disaccharide( two or three sugar), Polysaccharide( polymers of many sugar in large chain). Thus, polysaccharide have largest chain of itself.
<h3 /><h3>What are Carbohydrates?</h3>
Cn(H2O)n is the basic formula for all carbohydrates . But this formula have limitation i.e it applies where same amount of carbon and water are use.
Initially the terms carbohydrate was used to describe compounds that have really contains carbohydrates. Because they had simple formula CH20.
In modern Era carbohydrates are classified on the basis of their structure not on their formulae. Such as aldehydes and ketones are now known as polyhydroxy.
Therefore, carbohydrates in size from smallest to largest is monosaccharide ( single sugar), disaccharude( two or three sugar), Polysaccharide( polymers of many sugar in large chain). Thus, polysaccharide have largest chain of itself.
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Answer:
Mutations leading to the better attachement of virus to the host cell would allow the virus to spread the infection and leave more progeny. The reproductive fitness of mutant viruses would allow the mutation to spread.
Explanation:
1. The organisms with same resource requirement compete with each other. Viruses are not living things but once inside the host cell, they behave like living things. Rapid multiplication of virus overpopulate the host cells.
2. Genetic variations are added to the viral progeny by random errors during replication of the viral genome. These random variations may impart beneficial trait, harmful feature or remain neutral. If a random mutation in the SARS-CoV2 virus allows it to adhere better to the cells of the respiratory system, the virus would be better able to infect these cells to spread the infection. Once inside the host cells, the mutant virus would leave more progeny. On the other hand, the wild type virus that lack this mutation would have lesser chances of entering the host cells and may or may not replicate.
3. The progeny of the mutant virus would compete better with the non mutant ones due to the presence of same mutation.
4. Differential reproduction and more progeny of the mutant virus would spread the mutation among the virus.
