Question

short note on Darwin's theory​

Answer 1

hope this helps u mate.....

Answer 2

Answer:

Explanation:

Darwin's theory was that natural selection is the most significant mechanism that causes species to change. It's a simple, and obvious concept, completely supported by our own observations of the world.

Natural selection can be summarized quite simply, as follows:

1. Variation exists in all populations. (No two organisms are identical.)
2. Some of that variation is heritable. (Offspring tend to resemble their parents more than they resemble other members of the population who are less closely related.)
3. Some individuals have more offspring than the average for their population, while other individuals have fewer offspring than average. (My parents had 5 kids, my uncle and aunt had 7, my neighbor has only one child.)
4. Some heritable traits increase the likelihood that the individuals who have those traits will reproduce. (If an individual is able to avoid predators, find enough food, and attract mates, he, she, or it is likely to have offspring.)
5. Other heritable traits make it less likely that an individual who has that trait will reproduce. (If an individual gets eaten by a predator, can't find food, or is repulsive to other members of the population, he, she, or it will have few or no offspring.)
6. Over the course of multiple generations, those heritable traits that prevent reproduction will disappear from the population. (If the individual has no offspring, nobody inherits the traits that prevent reproduction.)
7. Over the course of generations, those traits that increase the likelihood of reproduction will become more common, simply because those who are good at reproducing will have more descendants than their contemporaries who are not good at it.
8. Following from these points, over the course of generations, the average traits of the population are sure to change.
9. The traits that “fit" one environment are likely to be different from the traits that are well-suited to a different environment. (The ability to retain water is useful in a desert, so it will tend to become common. The same trait is not useful in the ocean, because water is everywhere.)
10. As two or more descendant populations of the same ancestor move into different environments, their average traits will diverge, both from their shared ancestors and from each other.
11. If two populations of descendants of the same ancestor become so well suited to their respective environments that they can no longer have offspring with members of their “distant cousin” species, then we recognize them as distinct species.

That's really all there is to Darwin's theory of natural selection. His book “On the Origin of Species,” says basically that. The entire rest of the book is just examples.

Of course, we've learned a lot more details about how inheritance works, why offspring resemble their parents, and several other variables that are important. So Darwin's idea is considered “correct, but incomplete” today.

As for why a small number of USAmerican Christians dispute the theory, (and an even smaller number of people from other nations and/or other religions), that's mostly due to misunderstanding.

For a series of complex reasons, some late 19th and early 20th century theologians concluded that a literal interpretation of a few chapters of Genesis was preferable to a figurative, metaphorical interpretation of the same text.

Those men (they were all men, no women) decided that people must either agree with them or be shunned by their community.

Sadly, that strategy worked, so now there's a small, but very vocal, group of people who are more willing to deny their own observations than to disagree with their pastors.

That's not mean as an insult, it's simply an observation. Anyone who “disagrees with evolution” doesn't know what evolution actually is.

Hope that helps