How Do Organisms Reproduce (Class - X)

Paramecium divides by transverse binary fission. Here, the plane of division is at right angle to the long axis of the animal.

Sponge is able to reproduce asexually by budding. This is when a small piece of sponge is broken off but is still able to survive and grow into another sponge.

It is incorrect. Budding can also be induced artificially.

Ball of cells-movement-specialisation is a sequence of events seen in regeneration. The cells of cut part of the body divide rapidly to form a ball of cells. These cells move to their proper places where they become specialised to form different types of tissues.

The terminal swollen portion of the pedicel of a flower is called thalamus.

The plants possessing only one type of unisexual flowers are called dioecious.

Sperms attain maturity in epididymis. They leave testes in an immature form.

Plasmodium (malarial parasite) completes only asexual phase of life cycle in humans. Merozoites are produced in humans.

The female homologues of male appendix testes are fallopian tubes.

Correct Answer: Human chorionic gonadotropin (hCG)

Chancroid is a bacterial infection caused by Haemophilus ducryi.

The length of all stamens is greater than that of petals in China rose.

Hormonal intrauterine devices contain progestin, which is a synthetic progestogen that has progestogenic effects similar to those of progesterone.

Guava roots, when sown in the soil, develop into a new plant by virtue of vegetative propagation. Guava roots possess buds from which new plants grow.

Androecium and gynoecium constitute the reproductive parts of a flower. Androecium is the male reproductive part and gynoecium is the female reproductive part.