The Fundamental Unit of Life — Science STD 9 — Question

Living organisms vary widely in size. However, even the largest organisms such as the giant redwood and the blue whale have cells that are roughly the same size as those in smaller organisms. Why are all cells small?

Which is the following is known as “physical basis of life”?

1. Gene.
2. Protoplasm.
3. Nucleolus.
4. Mitochondria.

Which among the following is correctly represented?

The skin is devoid of scales in:

1. Cartilaginous fish.
2. Bony fishes.
3. Reptiles.
4. Amphibians.

To solve the food problem of country, which among the following necessary?

1. Increased production and storage food grains.
2. Easy access of people to the food grain.
3. People should have money to purchase the grains.
4. All the above.

Which of the following is micronutrient?

1. Nitrogen
2. Phosphorus
3. Potassium
4. Boron

The fungus disease causing maximum death of poultry bird is:

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)

Metamerism is characteristic feature of:

1. Chordata.
2. Annelida.
3. Mollusca.
4. Nematoda.

Nucleus is absent in one of the following.