STD 11 - 6. Anatomy flowering plants — NEET STD 11 Science — Question

Assertion $A:$ In gymnosperms the pollen grains are released from the microsporangium and carried by air currents.

Reason $R$ : Air currents carry the pollen grains to the mouth of the archegonia where the male gametes are discharged and pollen tube is not formed.

In the light of the above statements, choose the correct answer from the options given below :

$II.$ Generally absent in primary phloem

$III.$ Much elongated and pointed

Given above characters belongs to which of the following?

$I.$ Cytokinins suppress the synthesis of chlorophyll.

$II.$ Auxins control apical dominance.

$III.$ Gibberellins promote shoot elongation.

$IV.$ Abscisic acid enabling seeds to withstand desiccation.

Which of the above statements are correct