Conifers are adapted to tolerate extreme environmental conditions because of

Select the mismatch:

Pollen chamber present in gymnosperms represents
1. Microsporangium
2. Pollen grain cell where sperms are formed
3. Opening of megagametophyte for passage of pollen tube to egg
4. Cavity in nucellus for resting pollen grains after pollination

Select the correct statement:

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 cuticle

4. Their seeds are not covered

Besides paddy fields, cyanobacteria are also found inside vegetative part of:

Pinus seed 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 obligate association with mycorrhizae.

4. it has very hard seed coat.

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 : 

What would be the number of chromosomes in the cells of aleurone layer in plant species that have 8 chromosomes in their synergids?