zigya tab

Define asexual reproduction. Describe the two methods of asexual reproduction in animals.


Asexual reproduction is that type of reproduction in which only single parent is involved. It takes place by different methods like budding, binary fission etc. 

(i) Budding : In this type of reproduction new individuals develop from the buds. For example - reproduction in hydra.

(ii) Binary fission : In this type of reproduction, a single organism gets divided into two. This type of reproduction takes place in Amoeba. The nucleus of the Amoeba divides into two, followed by division of their bodies, each part getting one nucleus and developing into separate individual.

899 Views

What is metamorphosis? Give examples.


Metamorphosis is the transformation of the larva into an adult through drastic changes.For example the transformation of a caterpillar into a butterfly is called metamorphosis. 

464 Views

Advertisement

In which female reproductive organ does the embryo get embedded?


Uterus.

341 Views

Advertisement

Differentiate between internal fertilization and external fertilization.


The differences between internal fertilization and external fertilization are: 

i. Internal fertilization takes place inside the body of the female while the external fertilization takes place outside the body of the female.

ii. In case of internal fertilization sperms are ejaculated in female’s body by the male. In external fertilization sperms are discharged outside the body of the female.

395 Views

Give two differences between a zygote and a foetus.


Zygote

Foetus

1. It contains only one cell.

2. It is formed by the fusion of ovum and sperm.

1. It contains many cells.

2. It is formed by repeated divisions of zygote.

590 Views

Advertisement