Question

differentiate between the male gametophtye of cycas,pinus and ephedera

Answer 1

In Cyacas:
Microspores are unwinged.
Only one prothallial cell is present.
The entire process completes within few months.

In Pinus:
Microspores are winged.
Two prothallial cells are present.
The entire process takes a year to complete.

In Ephedera:
Microspores are wingless.
Two prothallial cells are present.
The entire process takes few weeks.


Hope it helps............

Answer 2

Difference between Cycas, Pinus and Ephedra:-

Cycas:-

i) Cycas are evergreen perennials.

ii) Cycas are dioecious.

iii) Cycas is 5-15 feet in height.

Pinus:-

i) Pinus are evergreen perennials.

ii) Pinus is a monoecious plant.

iii) Pinus is about 15-45 metres in height.

Ephedra:-

i) Ephedra is perennial with scaly leaves.

ii) Ephedra are dioecious.

iii) Ephedra is a straggling shrub.