It is related to natural cycles which affect activities of ecosystems
natural energy conversion can help maintain/ restore balance
Answer:
The correct answer is - option B. The increase in testosterone prevents further production of GnRH, FSH, and LH
Explanation:
The high level of testosterone hormone produced by the testes shows a negative feedback system in males as an increase in this hormone leads to the inhibition of the GnRH from the hypothalamus and which in turn inhibits the production of the fH and FSH from the pituiyary gland.
This process in a negative feedback system which prevents the production of hormone by released by the same hormone. It leads to slow spermatogenesis
Answer: B. strong natural selection.
Explanation:
Speciation is the process by which new species form from the existing parent species. It occurs when the population of the species become reproductively isolated. In sympatric speciation the organisms living in the same geographical area becomes reproductively isolated due to changes in the behavior, morphology and genetic make up.
Among the option given, strong natural selection is the correct option. This is because of the fact that natural selection brings changes in the living being in terms of adaptation. The organism having better phenotypic trait will survive and reproduce. The beneficial traits will pass on to next generation may lead to evolution of new species. The members of the new species may not be able to breed with parent species.
Coevolution occurs when two or more species reciprocally affect each others evolution. The two species in question exerts selective pressure on each other thereby affecting each others evolution. The relationships that might exist include mutualism, predator-prey relationship and host-parasite relationship.
All this gradually shape the two species due to adaptations for survival and competitions.
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