Improvement in Food Resources — Science STD 9 — Question

Organelle without a cell membrane is:

Intracellular compartments are absent in:

AIDS virus has:

1. Single strand DNA.
2. Double strand DNA.
3. Single strand RNA.
4. Double strand RNA.

Manures and fertilizers are used to ensure:

Which of the following contribute to green house effect?

1. Methane (CH₄).
2. Carbon dioxide (CO₂).
3. Chlorofluorocarbons (CFCs).
4. All of these.

The skin is devoid of scales in:

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

Which one of the following fishes is a surface feeder?

Elephantiasis disease of human beings is caused by:

1. Wuchereria.
2. Ascaris.
3. Enterobius.
4. Ancylostoma.

The term ‘cell’ was given by:

1. Leeuwenhoek
2. Robert Hooke
3. Flemming
4. Robert Brown

The excretory organs of Annelida are:

1. Nephridia.
2. Statocysts.
3. Archeocytes.
4. None of the above.