CBSE Class 10 Biology How Do Organisms Reproduce?
Reproduction and Its Kinds
Copying of the DNA is one of the key processes of reproduction.
In Asexual reproduction only one parent is involved and an exact copy of the parent is produced. Sexual reproduction involves two sexually distinct individuals and promotes diversity of characters.
Modes of Asexual Reproduction
Thallophytes are plants without a well-differentiated and distinct body whereas, Bryophytes are plants with differentiated body but without vascular tissues.
Pteridophytes show a well-differentiated plant body and vascular tissues.
Reproductive System in Humans
Male and female undergo several changes during puberty.
In males, the testes produces sperm.
In females, the ovary produces ova that are released every month.
Sexual Reproduction in Humans
Fertilisation is the fusion of male and a female gamete. Gestation period for growth of fetus is 280 days.
AIDS, Gonorrhea and Syphilis are the common sexually transmitted diseases.
The methods to avoid contraception are barrier method, chemical method and surgical method.
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