In mosses, the sex organs are seen in:

1. Protonema stage

2. Leafy stage

3. Capsule of the sporophyte

4. Seta of the sporophyte

The features seen in the gymnosperm Cycas include:

I. Coralloid roots

II. Unbranched stems

III. Pinnate persistent leaves for a few years

IV. Male cones and megasporophyllys borne on same plant

1. I and II only

2. I and IV only

3. I, II and III only

4. I, II, III, and IV

The given diagram shows:

1. An alga that lacks flagellated cells

2. A liverwort

3. A heterosporous pteridophyte

4. A gymnosperm with non-motile sperms

Consider the following statements:

Gymnosperms-

I. Are plants in which the ovules remain exposed, both before and after fertilization.

II. Have male and female gametophytes that have independent free-living existence.

III. Are heterosporous.

Which of the above statements are true?

1. I and II only

2. I and III only

3. II and III only

4. I, II and III

Consider the following statements:

Which of the above statements are true?

1. I and II only

2. I and III only

3. II and III only

4. I, II and III

Consider the following statements:

Which of the above statements are true?

1. I and II only

2. I and III only

3. II and III only

4. I, II and III

Read the following five statements (I to V) and select the option with all correct statements.

1. I, III and IV

2. II, III and IV

3. I, IV and V

4. II, III and V

An example of colonial alga is

1. Chlorella

2. Volvox

3. Ulothrix

4. Spirogyra

Conifers are adapted to tolerate extreme environmental conditions because of

(1) broad hardy leaves

(2) superficial stomata

(3) thick cuticle

(4) the presence of vessels

Which one of the following statements is wrong?

(1) Algae increases the level of dissolved oxygen in the immediate environment

(2) Algin is obtained from red algae and carrageen from brown algae

(3) Agar-agar is obtained from Gelidium and Gracilaria

(4) Laminaria and Sargassum are used as food