Answer:
Darwin proposed the theory of natural selection to explain the process of evolution. According to Darwin’s theory of natural selection, all organisms have the potential to reproduce limitlessly irrespective of the fact that each species maintain a constant density over time. However, the struggle for existence, i.e. the competition among individuals for available resources to survive and reproduce, put a check on species density (D) and maintains it at a constant level (B). Survival of fittest is unequal ability of individuals to survive and reproduce based on suitability of their inherited characters to prevailing environmental conditions (A). It imparts the reproductive advantage to certain organisms which account for major part of the gene pool of the species. Thus, natural selection favors the individual with survival and/or reproductive advantage over others under existing environmental condition (E). Thus, the correct answer is option C.
The buffer was too acidic i.e when a blood film is viewed through the microscope, the RBCs appear redder than normal, the neutrophils are barely visible, and the eosinophils are bright orange.
<h3>What are buffer used for?</h3>
Buffers are employed to keep the pH of a solution steady because they can neutralize little amounts of extra acid or base. There is a specific pH range for a certain buffer solution and a predetermined amount of acid or base that can be neutralized before the pH changes. The buffer capacity is the maximum amount of acid or base that can be supplied to a buffer without causing a pH change.
As a pH value greater than 7.8 or lower than 6.8 might result in mortality, human blood contains a buffer of carbonic acid (H2CO3) and bicarbonate anion (HCO3-) to keep blood pH between 7.35 and 7.45.
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Answer: A-T or G-C
Explanation:
The single-nucleotide polymorphism in human genomes is a substitution of a single nucleotide which occur in a specific position at the genome. The A-T nucleotide may appear dominant in the most population, while the remaining minor population may have the G-C nucleotide. The DNA molecule in the population at this site have A-T or G-C.
Answer:
An amino acid has a common skeleton structure; an alpha carbon joined to 4 groups in its four covalent bonds. The groups are a Hydrogen (-H), a Carbonyl (-COOH), an Amino group (-NH3), and a side chain.
The side chains are variable across all amino acids which is the basis for their identification and naming. The side groups have different properties, therefore, giving different amino acid different structures and properties. These properties help in the folding of polypeptide chains into functional protein structures. This is due to their various interactions between the different amino acids that help proteins form structures like disulfide bridges, beta-sheets and alpha-helices.
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<span>The mineral crystals in obsidian are too small to see without a microscope. This is because the rock cools so rapidly from magma that crystals barely have time to form. Obsidian is a normally happening volcanic glass framed as an extrusive molten shake. It is delivered when felsic magma expelled from a well of lava cools quickly with negligible precious stone development.</span>
