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448.
What may be the possible advantage accrueing out of the presence of antheridia and archegonia on the underside of a fern prothallus
A
They are proteted from direct rays of sun
B
Capillary water ccumalates on the underside of the prothallus between its lower surface and the soil surface. Sex organs projecting in this water can be readily fertilize by the Flagelalted antherozoids which are chemotactically attracted by the archegonia
C
The sex organs are protected from the wind
D
Nutrients manufactured by the green prothallus can readily seep downwards to the sex organs due to the action of gravity
Answer :
Capillary water ccumalates on the underside of the prothallus between its lower surface and the soil surface. Sex organs projecting in this water can be readily fertilize by the Flagelalted antherozoids which are chemotactically attracted by the archegonia