Plant Kingdom · Question 34

Select the correct statement

1. Sequoia is one of the tallest trees.
2. The leaves of gymnosperms are not well adapted to extremes of climate.
3. Gymnosperms are both homosporous and heterosporous.
4. Salvinia, Ginkgo and Pinus all are gymnosperms.

In bryophytes and pteridophytes, transport of male gametes requires

1. birds
2. water
3. wind
4. insects.

Conifers are adapted to tolerate extreme environmental conditions because of

1. broad hardy leaves
2. superficial stomata
3. thick cuticle
4. presence of vessels.

Which one of the following statements is wrong?

1. Algae increase the level of dissolved oxygen in the immediate environment.
2. Algin is obtained from red algae, and carrageenan from brown algae.
3. Agar-agar is obtained from Gelidium and Gracilaria.
4. Laminaria and Sargassum are used as food.

Which one of the following statements is wrong?

1. Chlorella and Spirulina are used as space food.
2. Mannitol is stored food in Rhodophyceae.
3. Algin and carrageenan are products of algae.
4. Agar-agar is obtained from Gelidium and Gracilaria.

In which of the following, gametophyte is not independent free living?

1. Pteris
2. Pinus
3. Funaria
4. Marchantia

Read the following five statements (A to E) and select the option with all correct statements.

1. A, D and E
2. B, C and E
3. A, C and D
4. B, C and D

Male gametes are flagellated in

1. Ectocarpus
2. Spirogyra
3. Polysiphonia
4. Anabaena.

Which one of the following is wrong about Chara?

1. Upper oogonium and lower round antheridium
2. Globule and nucule present on the same plant
3. Upper antheridium and lower oogonium
4. Globule is male reproductive structure

Which of the following is responsible for peat formation?

1. Marchantia
2. Riccia
3. Funaria
4. Sphagnum