Hydrophily

Q.

Both wind and water pollinated flowers are not very colourful and do not produce nectar and scent.

1. True

2. False

Q. Which of the following could be a possible reason for the limited distribution of some bryophytes and pteridophytes?

1. Alternation of generation
2. Sporogenesis
3. Thalloid structure
4. Aquatic reproduction

Q. Feeding on dead and decaying organisms is a nutrition called:

Q. The system of plant classification proposed by Carl Linnaeus was an artificial system because _____.

1. It was based on evolutionary relationships of plants
2. It was based on similarities and differences in morphological characters only
3. It took into account the physiological facts and morphological characters
4. None of the above

Q.

Which of the following statements is/are correct for hydrophily?

(i) Pollination by water is rare in flowering plants and is limited mostly to monocotyledons.

(ii) In majority of aquatic plants such as water hyacinth and water lily pollination takes place by insects and wind

(iii) In most of the water pollinated species pollen grains are protected from wetting by a mucilaginous covering.

(iv) In Vallisneria, female flowers reach the surface of water and receive the pollen grains, whereas in Zostera, female flowers remain submerged and receive pollen grains under water.

1. Only (i) &(ii)

2. Only (iii) & (iv)

3. Only (ii)

4. (i), (ii), (iii) & (iv)

Q. Which of the following is not true about water pollinated flowers?

1. The flowers are brightly coloured and produce nectar.
2. Examples of water pollinated plants are Vallisneria and Hydrilla
3. In most of the water-pollinated species, pollen grains are protected from wetting by a mucilaginous covering.
4. In seagrasses, pollen grains are long, ribbon-like and are carried passively inside the water.

Q. Pollen grains from which of the following plants have a higher probability of having a mucilaginous covering?

1. Water hyacinth
2. Sunflower
3. Sweet pea
4. Hydrilla

Q.

Which of the following statements is incorrect with respect to hydrophilly?

1. Hydrophilous flowers are not colourful

2. Hydrophilous flowers do not produce nectar

3. Hydrophilous flowers are always submerged in water

4. Hydrophilous flowers produce numerous pollen grains

Q. Choose the odd one out

1. Ovule - integument
2. Microsporangia - tapetum
3. Cleistogamous flowers - Oxalis
4. Anemophily - Hydrilla

Q. Which one is saprophytic in nutrition?