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Nadya [2.5K]
3 years ago
14

Which example illustrates Darwin's main contribution to the theory of evolution?

Biology
1 answer:
GuDViN [60]3 years ago
8 0
Are there any specific examples with this question??

Darwin's main contribution to evolution was the METHOD that species evolve, which is via Natural Selection. Random gene mutations over considerably long periods of time lead to differences in traits of individuals within a species. Those with traits for adaptation that confers an advantage to procreate or survive longer to procreate more, are selected for by nature, hence Darwin's term. Over time those genes for traits giving advantages will increase in a population. Then the population of this species is said to have evolved (changed).
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Body maintain Homeostasis by Negative Feedback mechanism. Because the stimuli causing the disturbance in the Homeostasis of the body is to be counteracted by a mechanism.

<h3></h3><h3>What is homeostasis?</h3>

The Homeostasis of the body is defined as the regulation of the internal environment of the body when there is a change.

In Positive feedback mechanism, it increases the response of the stimuli In temperature regulation, the stimuli are hot and cold.

Both are controlled by a opposing negative feedback mechansim that is when the body temeprature increases it is decreased to normal by a negative feedback mechanism , likely when the body temeprature is decreased(cold) , the body will increase the Body temeprature to normal By a Negative feedback mechanism that is exactly opposite(opposing) to the Former Negative feedback mechanism pathway.

In termparature regulation when body temperature raises ----->detected by nerve endings in the skin--Hypothalamus -----> signal to blood vessel for dilation activation of the sweat gland-the tempertaure is maintained to normal. -> signal send to the>heat is lossed and when body temperature decreases -----> detected by nerve endings in the skin------> signal send to the hypothalamus -----> signal to blood vessel for constriction inhibition of secretion from sweat gland, shivering ---->heat is generated -->normal.

For more information regarding hypothalamus, visit:

brainly.com/question/1022285

#SPJ1

 

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