MCQ Questions for Class 10 Science How do Organisms Reproduce? with Answers

Reproduction ensures the continuation of a species by producing new individuals and passing genetic information from one generation to the next.

Asexual reproduction involves one parent and produces genetically identical offspring. Sexual reproduction involves two parents and leads to variation in offspring.

The main types include binary fission, multiple fission, budding, fragmentation, regeneration, spore formation, and vegetative propagation.

Binary fission is a type of asexual reproduction in which a single organism divides into two equal and identical individuals. It is common in Amoeba and bacteria.

In multiple fission, a parent cell divides into many daughter cells simultaneously. It is seen in organisms like Plasmodium.

Vegetative propagation is a form of asexual reproduction in plants where new plants grow from roots, stems, or leaves of the parent plant.

Pollination is the transfer of pollen grains from the anther to the stigma of a flower.

Fertilization is the fusion of male and female gametes to form a zygote, which later develops into a seed.

The stamen is the male reproductive part that produces pollen grains. The pistil (carpel) is the female reproductive part that contains the ovary and ovules.

Fertilization in humans occurs in the fallopian tube.

The placenta provides oxygen and nutrients to the developing embryo and removes waste products from its blood.

The menstrual cycle is a monthly cycle in females (about 28 days) that prepares the body for pregnancy.

During puberty, individuals develop secondary sexual characteristics such as voice changes in boys and breast development in girls.

Variation increases the chances of survival of a species in changing environmental conditions.

Common methods include condoms, oral contraceptive pills, Copper-T (IUD), vasectomy, and tubectomy.

STDs are infections transmitted through sexual contact. Examples include HIV/AIDS, syphilis, and gonorrhea.

Regeneration is the ability of an organism to regrow lost body parts, as seen in Planaria.

DNA carries genetic information and ensures that traits are passed from parents to offspring during reproduction.