Question

3) Give the chief wasons for the development of adaptive features in an organisums​

Answer 1

Answer :-

• All organisms need to adapt to their habitat to be able to survive.
• This means adapting to be able to survive the climatic conditions of the ecosystem, predators, and other species that compete for the same food and space.
• Positive natural selection, or the tendency of beneficial traits to increase in prevalence (frequency) in a population, is the driving force behind adaptive evolution.
• For a trait to undergo positive selection, it must have two characteristics.
• First, the trait must be beneficial; in other words, it must increase the organism's probability of surviving and reproducing.
• Second, the trait must be heritable so that it can be passed to an organism's offspring.
• Beneficial traits are extremely varied and may include anything from protective coloration, to the ability to utilize a new food source, to a change in size or shape that might be useful in a particular environment.
• If a trait results in more offspring who share the trait, then that trait is more likely to become common in the population than a trait that arises randomly.
• At the molecular level, selection occurs when a particular DNA variant becomes more common because of its effect on the organisms that carry it.

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Answer 2

An adaptation is any heritable trait that helps an organism, such as a plant or animal, survive and reproduce in its environment.