Mutation
is random, natural selection isn't random because those mutations which
are most adaptable to the environmental conditions of the time are
those which produce more offspring. I mean, "selection", by definition,
isn't "random". <span>The
clue is in the title. It's not considered random for the simple reason
that it's not random. Natural selection is an extremely deterministic
process. So, i guess it's (D) Natural Selection
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Answer:
The reaction between an acid and a base is termed as neutralization reaction. This is because when an acid reacts with a base, they cancel out or nullify each other. In general it can be represented as :
Examples from daily life:
When a person is suffering from acidity, he is advised to take antacid tablets. This is because the excessive acid present in the stomach is nullified by basic nature of antacids .
Explanation:
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Answer:
Water is the common solvent of the body
Water is a polar, covalent molecule
The high heat capacity of water relates to its ability to absorb significant
amounts of heat before changing one degree celsius
.
Acids have a higher concentration of free H+ than are found in bases
Explanation:
Water is also called universal solvent because it can dissolve a large number of polar compounds due to its polar nature. In water, covalent bond is present between hydrogen and oxygen due to which partial positive charge occurs on hydrogen and partial negative charge appears on oxygen atom due to difference in electronegativity values. Acids has high concentration of proton (H+) while bases has high amount of OH- ions.
The scientist can tell that punctured equilibrium has occurred if they have examined the fossil fuels and can see that one organism rapidly evolved different characteristics.
Answer: Option D
<u>Explanation:</u>
Punctured Equilibrium is an evolutionary theory which proposes that the species appearing in the fossil's record will show little evolutionary changes. In punctuated equilibrium, change occurs gradually, First very little change can be seen which later results in the occurrence of huge changes.
Such huge changes can be clearly seen by examining the fossil records. Thus if there is any evolutionary changes seen in the fossil's record, the scientist can conclude the occurrence of punctuated equilibrium.