The 'sulphur shower' condition is related to:

Diploxylic or polyxylic vascular bundles are found in

Plants which can photosynthesize at as low temperatures (up to $-35^o C$) are:

Which of the following is considered a living fossil?

In $Pinus$,male gametes are produced in the pollen tube by the division of which of the following cells?

In gymnosperms,the leaves are well-adapted to withstand extremes of temperature,humidity,and wind. What are the xeric characters in conifers?