Tissues — Science STD 9 — Question

Phylum mollusca can be distinguished from other nonchordates by the presence of:

1. Bilateral symmetry and exoskeleton.
2. A mantle and gills.
3. Shell and non-segmented body.
4. A mantle and a non-segmented body.

Which of the following in natural insecticides?

1. Nicotine
2. Neem
3. Pyrethrum
4. All of these

Name the gas which plays a major role in global warming:

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

The functional units of Golgi apparatus are:

Mitochondria are seats of:

The excretory organs of Annelida are:

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

In a hypotonic solution, the cell:

Algae are characterized by:

1. Pyrenoids.
2. Aquatic habit.
3. Unicellular sex organ.
4. All 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.

Water molecules move from their ______ concentration to their ______ concentration during osmosis: