STD 11 - 9. Biomolecules — BIOLOGY STD 11 Science — Question

$(i)$ Glycocalyx is the outermost envelope in bacteria.

$(ii)$ The glycocalyx could be a loose sheath called capsule.

$(iii)$ The glycocalyx may be thick and tough called slime layer.

$(iv)$ A special structure formed by the plasma membrane is called mesosome.

$(v)$ Small bristle like fibres sprouting out of the cell are called fimbriae.

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 :

$X - Y - Z$