Which of the following statements is incorrect about gymnosperms?

1. They are heterosporous

2. Male and female gametophytes are free-living

3. Most of them have narrow leaves with thick cuticles

4. Their seeds are not covered

Which of the following genera is associated with coralloid roots?

Cycas is classified as a gymnosperms due to its

Match the following selected the correct option.

1. A - (iv), B - (ii), C - (i), D - (iii)

2. A - (iv), B - (i), C - (ii), D - (iii)

3. A - (ii), B - (iii), C - (iv), D - (i)

4. A - (i), B - (iv), C - (iii), D - (ii)

Read the following statements and select the option with correct statements

1. (a) and (b) only         
2. (b) and (c) only
3. (a), (b) and (c)
4. (a), (c) and (d)

Pinus seeds cannot germinate and establish without fungal association. This is because:

1. its seeds contain inhibitors that prevent germination.

2. its embryo is immature.

3. it has an obligate association with mycorrhizae.

4. it has a very hard seed coat.

The unbranched stem is character of which gymnosperm:-

1. Pinus

2. Cycas

3. Cedrus

4. Lycopodium

Choose the incorrect match from following:-

1.  Cycas-branched stem.

2.  Salvinia-heterosporous sporophyte.

3.  Marchantia-Elaters.

4.  Chlorella-used by space travellers.

Examine the figures A, B, C and D. In which one of the four options all the items, A, B, C and D are correct?

Options : 

In gymnosperms, the ovule is naked because

1. Ovary wall is absent

2. Integuments are absent

3. Perianth is absent

4. Nucellus is absent