Mutation is an important mechanism for evolutionary change. Which type of mutations contribute to evolution?

1 answer:

7 0

<span>Both somatic and germinal mutations are contributors of evolution. Somatic mutations occur within tissues of individuals that give the said individual differing traits and characteristics. Germinal mutations occur in reproductive cells that can be passed on to offspring, altering their traits and characteristics.</span>

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Because it is difficult to excrete iron once it is in the body, iron balance is maintained primarily through absorption. The iro

Rzqust [24]

<h2>The given statement is true</h2>

Explanation:

Iron absorption occurs in the duodenum and upper jejunum of small intestine

At physiological pH ferrous iron is rapidly oxidized to the insoluble ferric form
Gastric acid lowers the pH in the duodenum which enhances the solubility and uptake of ferric iron
Once iron gets inside the enterocyte it can be stored as ferritin;Ferritin is a hollow spherical protein which helps in storage and regulation of iron levels within the body
Ferritin molecule have ferroxidase activity which helps in the mobility of Fe2+ out of the enterocyte by ferroportin
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Fe3+ binds to transferrin so Fe2+ transported through ferroportin must be oxidized to Fe3+
Fe2+ needs to be oxidized first so that it can be transported through ferroportin
Once iron gets inside the cell it can be used for various cellular processes

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Producers or Primary Consumers are the beginning link in a food chain while Decomposers or Tertiary Consumers are at the end of

patriot [66]

Answer: The given statement is True.

Food chain can be described as the sequence of transfer of energy and matter among different organisms present within an ecosystem.

It starts with producers ( occupying the first trophic level), which are consumed by consumers in a successive manner ( primary consumer→ secondary consumers→ tertiary consumer or decomposers).

Therefore, producers are beginning link in a food chain whereas decomposers occupy the last level in a food chain.

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What is interkinesis??

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Answer:

Interkinesis or interphase II is a period of rest that cells of some species enter during meiosis between meiosis I and meiosis II. No DNA replication occurs during interkinesis; however, replication does occur during the interphase I stage of meiosis.

Explanation:

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Answer: magnesium atom

Explanation:

magnesium atom

The chlorophyll molecule consists of a central magnesium atom surrounded by a nitrogen-containing structure called a porphyrin ring; attached to the ring is a long carbon–hydrogen side chain, known as a phytol chain.

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