Plant Kingdom

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

Male gametophyte with least number of cells is present in

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

Which one of the following shows isogamy with non-flagellated gametes?

1. Sargassum
2. Ectocarpus
3. Ulothrix
4. Spirogyra