Improvement in Food Resources — Science STD 9 — Question

Colourless plastids are known as:

1. Leucoplasts.
2. Chromoplasts.
3. Chloroplasts.
4. None of the above.

Cell inclusions are:

1. Non-living materials present in the cytoplasm.
2. Another name of cell organelles.
3. Cytoskeletal framework of cell.
4. Combined name for cell wall and plasma membrane.

Which of the following plant group bears naked seeds?

1. Pteridophyta.
2. Bryophyta.
3. Gymnospermae.
4. Angiospermae.

The jersey bull used for crossbreeding is exotic variety from:

1. England
2. Scotland
3. Switzerland
4. Holland

Cardiac muscles are:

Amoeba acquires its food through a process, termed:

Name the gas which plays major role in global warming:

1. Carbon monoxide.
2. Nitrous oxide.
3. Carbon dioxide.
4. Sulphur dioxide.

Each cell of unicelluler organism performs certain functions such as _________.

Male Ascaris can be distinguished from female ones by:

1. Urved posterior.
2. Round shape end.
3. Presence of penial setae.
4. Both (a) and (c).

Who first discovered nucleus in cell in 1831?