Short Answer TypeState the basic requirement for sexual reproduction? Write the importance of such reproductions in nature.
The basic requirements for sexual reproduction:
Sexual reproduction involves fusion of male and female gametes coming from both the parents. In the sexual reproduction, a new individual is formed by the fusion of two haploid gametes, one from the male parent and the other from the female parent.
The importance of sexual reproduction:
(i) The Combination of DNA from two different individuals lead to increase in genetic variation in the offsprings.
(ii) This leads to diversity in the population which helps in natural selection.
State the changes that take place in the uterus when :
Implantation of the embryo has occurred.
State the changes that take place in the uterus when :
Female gamete/egg is not fertilised
Explain with the help of an example each, how the following provides evidence in favour of evolution:
Homologous organs
Explain with the help of an example each, how the following provides evidence in favour of evolution:
Analogous organs
Explain with the help of an example each, how the following provides evidence in favour of evolution:
Fossils
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