Animal Kingdom — BIOLOGY STD 11 Science — Question

$I.$ In gymnosperms, the male and female gametophytes have an independent existence.

$II.$ The multicellular female gametophyte is retained within the megasporangium.

$III.$ The gymnosperms are heterosporous.

Of these statements

$(i)$ The endomembrane system includes plasma membrane, ER, Golgi complex, lysosomes and vacuoles.

$(ii)$ ER helps in the transport of substances, synthesis of proteins, lipoproteins and glycogen.

$(iii)$ Ribosomes are involved in protein synthesis.

$(iv)$ Mitochondria help in oxidative phosphorylation and generation of $ATP$.