STD 11 - 16. Excretory product and their elimination — BIOLOGY STD 11 Science — Question

$I.$The portion of the spectrum between $300-500 \;nm$ is also referred to as Photosynthetically Active Radiation $(PAR)$.

$II.$ Magnesium, calcium and chloride ions play prominent roles in the photolysis of water:

$III.$ In cyclic photophosphorylation, oxygen is not released (as there is no photolysis of water) and $NADPH$ is also not produced.

$(a)$ Heterospory

$(b)$ Endosporic development of gametophyte

$(c)$ Reduced gametophyte

$(d)$ Localization of sporangium bearing appendages in strobili

$(e)$ Unisexual gametophytes

$(f)$ Fertilization with the help of water

$(i)$ 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.