An essential nutrient<span> is a </span>nutrient<span> that the body cannot synthesize on its own -- or not to an adequate amount -- and must be provided by the diet. These</span>nutrients<span> are necessary for the body to function properly. On the other the non-essential ones cannot be made inside the body so they are acquired from the food we eat.</span>
Answer:
lower activation energy
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Explanation:
Catalysts make such a breaking and rebuilding happen more efficiently. They do this by lowering the activation energy for the chemical reaction. Activation energy is the amount of energy needed to allow the chemical reaction to occur. The catalyst just changes the path to the new chemical partnership.2
Answer:
D. Sterility Locus
Explanation:
Angiosperms have several mechanisms to prevent self-pollination due to the advantage of cross-pollination. One of such mechanisms is self-incompatibility genes present on the sterility locus.
These genes determine the germination of the pollen on the stigma. If both the pollen and stigma carry the same allele of the gene present at the sterility locus, the germination of pollen is prevented.
The sterility locus has multiple alleles and the presence of the same alleles at the same locus in both pollen and stigma prevents the pollen germination.
For example, pollen from S1S2 individuals can not germinate on the stigma with the S1S3 genotype. Here, the pollen does not obtain water as required for germination from the stigma and are unable to germinate.
Answer:
The correct option is <u>A. It will soon start to grow.</u>
Explanation:
In biological terms, a food chain can be described as a linear representation of energy flow in an ecosystem. It usually starts with the producers and then represents a chain until the decomposers.
A change in any of the species population of the food chain can affect the food chain widely. For example, in the question above, <em>as the population of algae increases, the population of minnows will also increase. This is because there will be more supply of food for the minnows.</em>
