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Identify the set of correct statements:
A. The flowers of Vallisneria are colourful and produce nectar.
B. The flowers of water lily are not pollinated by water.
C. In most of water-pollinated species, the pollen grains are protected from wetting.
D. Pollen grains of some hydrophytes are long and ribbon like.
E. In some hydrophytes, the pollen grains are carried passively inside water.
Choose the correct answer from the options given below.
The type of conservation in which the threatened species are taken out from their natural habitat and placed in special setting where they can be protected and given special care is called:
Bulliform cells are responsible for:
Formation of interfascicular cambium from fully developed parenchyma cells is an example for:
Hind II always cuts DNA molecules at a particular point called recognition sequence and it consists of:
Tropical regions show greatest level of species richness because:
A. Tropical latitudes have remained relatively undisturbed for millions of years, hence more time was available for species diversification.
B. Tropical environments are more seasonal.
C. More solar energy is available in tropics.
D. Constant environments promote niche specialization.
E. Tropical environments are constant and predictable.
Choose the correct answer from the options given below.
How many molecules of ATP and NADPH are required for every molecule of CO₂ fixed in the Calvin cycle?
These are regarded as major causes of biodiversity loss:
A. Over exploitation
B. Co-extinction
C. Mutation
D. Habitat loss and fragmentation
E. Migration
Choose the correct option:
The capacity to generate a whole plant from any cell of the plant is called:
Match List I with List II
| List-I | List-II | ||
|---|---|---|---|
| A. | Rhizopus | I. | Mushroom |
| B. | Ustilago | II. | Smut fungus |
| C. | Puccinia | III. | Bread mould |
| D. | Agaricus | IV. | Rust fungus |
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