Tissues — Science STD 9 — Question

Epithelial tissue always has an exposed outer surface and an inner surface anchored to connective tissue by a thin, non-cellular structure called the:

1. Nonstratified layer.
2. Stratified membrane.
3. Basement membrane.
4. Fibroblast.

A group of similar freely inter-breeding organisms constitutes a:

1. Species.
2. Genera.
3. Family.
4. Class.

Dwarfness in cereals is a desirable agronomic trait because:

Which of the following is a monocot?

1. Carrot.
2. Wheat.
3. Mango.
4. Mustard.

Howis a bacterial cell different from an onion peel cell?

.......... are involved in intracellular digestion?

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

Balanoglossus belons to Hemichordata which forms a connecting link between:

1. Urochordates and cephalochordates.
2. Urochordates and vertebrates.
3. Cephalochordates and vertebrates.
4. Nonchordates and chordates.

Nif genes occur in:

1. Rhizobium.
2. Streptococcus.
3. Penicillium.
4. Aspergillus.

Sustainable agriculture involves: