The Fundamental Unit of Life — Science STD 9 — Question

Which of the following yields maximum milk/ year?

The infoldings in mitochondria are known as:

1. Cristae.
2. Matrix.
3. Cisternae.
4. Grana

A fat person is less affected by the cold wheather because of the presence of more.

Animal husbandry is the scientific management of:

1. Animal breeding.
2. Culture of animals.
3. Animal livestock.
4. Rearing of animals.

1. (i), (ii) and (iii)
2. (ii), (iii) and (iv)
3. (i), (ii) and (iv)
4. (i), (iii) and (iv)

Several embryos can be produced at a time in a single cow by the process of:

1. Hybridization.
2. Artificial insemination.
3. Embryo transfer.
4. Random mating.

The covering tissue of external and internal surfaces of animals is:

1. Connective
2. Muscular
3. Nervous
4. Epithelial

A chronic disease is:

1. Hypertension.
2. Typhoid.
3. Diarrhoea.
4. Kala-azar.

Name the stain which is commonly used to study plant cells.

Select the most appropriate option.Eukaryotic cells have a dense double membrane-bound structure inside, called:

Schwann and Schleiden were: