P-2 Animal Classification — Science STD 10 — Question

Describe the separation methods which are based on gravitation.

Explain the cleansing action of soap. Draw diagrams to illustrate your answer.

The image in a plane mirror is virtual and laterally inverted. What does this statement mean?

How energy is formed from oxidation of carbohydrates, fats and proteins?
Correct the dagram below.


 

Explain with diagram step-by-step energy conversion in Hydroelectric power plant:

There are four tiny organisms A, B, C and D. The organism A is a parasitic protozoan which causes a disease known as kala-azar. The organism B is a microscopic single-celled animal which causes malaria disease in human beings. The organism C is a unicellular animal which can change its body shape according to need, it has no fixed shape. The organism D is also a unicellular animal which is slipper-shaped having a large number of tiny hair all around its body.

1. Name the organisms A, B, C and D.
2. Name one characteristic body feature of organism A.
3. Name the insect which carries organism B and transmits it from one person to another.
4. What name is given to the asexual method of reproduction of (i) organism A, and (ii) organism B?
5. Where do organisms C and D live?

Construct ray diagrams to illustrate the formation of a virtual image using:

1. A converging lens, and.
2. A diverging lens.

What is the importance of a chemical equation? OR Give the significance of a chemical equation.

Explain with examples types of asexual reproduction in unicellular organism.

What are symptoms of diseases like night blindness, rickets, beriberi, neuritis, pellagra, anaemia, scurvy?