Regeneration in planarians depends on the presence of stem cells called neoblasts. These cells are distributed throughout the body and, when part of the worm has been amputated, they are activated to reform the tissues that have been removed.
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There are two genders known to science, male and female. People nowadays have the ability to alter their gender, but in the end, there are really only two.
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The answer is Body parts created <span>during the first trimester, and they complete their development during the third.</span>
Answer:
Primitive Earth where life emerged was subjected to extreme conditions
Explanation:
The origin of life is still an issue of intense debate today, although most researchers believe that life emerged from primitive organisms generated by the synthesis of organic compounds in early Earth. In line with this theory, it has been shown that membrane-forming compounds can be formed in extreme conditions (i.e., UV rays, extreme temperature, etc). It is believed that such conditions recreated in a laboratory were similar to the early Earth about 3,900 million years ago, thereby supporting the idea of the 'primordial soup theory' proposed by John Burdon Sanderson Haldane in 1929.
Answer:
A) A single gene can only influence a single trait
Explanation:
One gene has the possibility of influencing many traits and in the same manner, multiple genes can affect a single trait.
