Which of the following plants is not present in order Gnetales?
In gymnosperms, endosperm represents
Read the following statements w.r.t. gymnosperms.
(a) Leaves in gymnosperms have thick cuticle and sunken stomata.
(b) Zamia is the tallest gymnosperm.
(c) Ginkgo biloba have fan shaped leaves.
(d) Microsporophylls are compactly arranged on central axis to form a microsporangiate.
(e) Two kinds of spores are produced within sporangia that are borne on male strobili.
Select the option with correct set of statements.
Largest male and female gamete are formed by __________and ________ respectively.
Drug used in curing respiratory ailments is obtained from
Statement-A: Male gametophyte in gymnosperms is highly reduced. Statement-B: Megasporophylls are compactly arranged in Cycas.
Select the incorrect statement w.r.t. Cycas.
Which of the following is not a living fossil?
_______is the tallest tree species.
Sulphur shower is the phenomenon related to
