Cell The Unit of Life — BIOLOGY STD 11 Science — Question

$I.$ Each myosin is a polymerized protein

$II.$ Many meromyosin constitutes one thick filament (myosin)

$III.$ Each meromyosin's tail is called heavy meromyosin $(HMM)$ and head is called light meromyosin $(LMM)$

$IV.$ The globular head is an active $ATP$ ase enzyme and has binding sites for $ATP$ and active sites for actin

Choose the option with correct statements

$A.$ Mosses and lichens are the first organisms to colonise a bare rock.

$B.$ Selaginella is a homosporous pteridophyte.

$C.$ Coralloid roots in Cycas have $VAM$.

$D.$ Main plant body in bryophytes is gametophytic, whereas in pteridophytes it is sporophytic.

$E.$ In gymnosperms, male and female gametophytes are present within sporangia located on sporophyte.