Selection：练习题

In natural selection, which factor determines which individuals are most likely to survive and reproduce?

In the context of evolution, state one specific factor that leads to a struggle for survival within a population.

Outline one major difference between natural selection and artificial selection regarding the selection pressure applied to a population.

Define the term natural selection with reference to its outcome for a population over many generations.

The process of natural selection is the mechanism behind evolution.
Describe the process of natural selection with reference to the following four points:
(i) Genetic variation within a population
(ii) Struggle for survival
(iii) Differential reproduction
(iv) Inheritance of alleles<\/p>

Farmers use selective breeding to enhance specific traits in their crops and livestock.
(a) Outline the steps involved in using selective breeding (artificial selection) to improve the protein content of a grain crop over several years.
(b) State two major differences between natural selection and selective breeding. <\/p>