1. A cell in the pollen grain in which the sperms are formed
2. A cavity in the ovule in which pollen grains are stored after pollution
3. An opening in the megagametophyte through which the pollen tube approaches the egg
4. The microsporangium in which pollen grains develop
A cavity in the ovule in which pollen grains are stored after pollution
1. 2
2. 1
3. 3
4. 0
2
1. Ephedra
2. Eucalyptus
3. Cannabis
4. Saccharum
Ephedra
1. Thuja
2. Pinus
3. Ginkg
4. Araucaria
Ginkg
1. Ephedra
2. Cycas
3. Pinus
4. Araucaria
5. Cedrus
Ephedra
1. Carbon dioxide and water
2. Carbon monoxide
3. Methane
4. Carbon dioxide and methane
Carbon dioxide and water
1. Maize
2. Mint
3. Peeple
4. Pinus
Pinus
1. Dryoptreris
2. Cycas
3. Pinus
4. Both (a) and (c)
Both (a) and (c)
1. To reduce the emission of SO2 in exhaust fumes
2. To increase efficiency of automobile engines
3. To use sulphur removed from petroleum for commercial purposes
4. To increase life span of engine silencers
To reduce the emission of SO2 in exhaust fumes
1. Laterally
2. Abaxially
3. Adaxially
4. Marginally
Abaxially