Two very small organisms X and Y both reproduce by the method of budding. Organism X is industrially very important because it is used in making alcohol from sugar. It is also used in making bread. Organism Y is a tiny animal having tentacles which lives in water.

(a) What is organism X?

(b) Name the process in which X converts sugar into alcohol.

(c) To which class of organism does X belong?

(d) What is organism Y?

(e) Out of X and Y, which organism is multicellular and which one is unicellular?

Choose the most appropriate answer :

A tadpole develops into an adult frog by the process of

Choose the most appropriate answer :

The number of nuclei present in a zygote is

Indicate whether the following sentences is True (T) or False (F) :

Oviparous animals give birth to young ones.

Indicate whether the following sentences is True (T) or False (F) :

Each sperm is a single cell.

Indicate whether the following sentences is True (T) or False (F) :

External fertilisation takes place in frog.

Indicate whether the following sentences is True (T) or False (F) :

A new human individual develops from a cell called gamete.

Indicate whether the following sentences is True (T) or False (F) :

Egg laid after fertilisation is made up of a single cell

Indicate whether the following sentences is True (T) or False (F) :

Amoeba reproduces by budding.

Indicate whether the following sentences is True (T) or False (F) :

Fertilisation is necessary even in asexual reproduction.

Indicate whether the following sentences is True (T) or False (F) :

Binary fission is a method of asexual reproduction.