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?

(1) Cycas

(2) Taxus

(3) Pinus

(4) Sequoia

Cycas is classified as a gymnosperms due to its

1. motile sperms

2. fruit formation

3. naked ovule

4. pycnoxylic wood

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
(a) In Wolfia, the highly reduced female gametophyte
present within ovule, is embryo sac.
(b) The ploidy level of endosperm in Cycas and
Eucalyptus is triploid.
(c) Azolla is a water fern.
(d) Majority of the red algae are marine with greater
abundance in the warmer areas.
(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