Improvement in Food Resources — Science STD 9 — Question

The most common type of ground tissue is:

1. Epidermis.
2. Collenchymas.
3. Sclerenchyma.
4. Parenchyma.

A plant body not differentiated into root, stem and leaves is termed as:

1. Thallus.
2. Mycelium.
3. Hyphae.
4. Herb.

In a natural ecosystem, decomposers include:

1. Bacteria and fungi.
2. Parasitic algae.
3. Macroscopic animals.
4. All the above.

A disease transmitted through sexual contact is:

1. HIV.
2. Gonorrhoea.
3. Syphylis.
4. All the above.

Describe the causes and effects of air pollution.

Seat of photosynthesis is:

1. Leuciplast
2. Chloroplast
3. Chromoplast
4. Both a and c

A group of cells alike in form, function and origin are called __________.

1. Tissue
2. Organ
3. Organelle
4. None of these

Layers continue to produce eggs upto:

1. 350 days
2. 425 days
3. 500 days
4. 600 days

Goitre is caused due to deficiency of disease?

1. Fluorine.
2. Vitamin C.
3. Vitamin A.
4. Iodine.