MCQ
The snakes are included under
- ASaprophytes
- BPrimary consumers
- CSecond trophic level
- ✓None of these
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$I -$ Tapetum nourishes the developing pollen grains.
$II-$ Hilum represents the junction between ovule and funicle
$III-$ In aquatic plants such as water hyacinth and water lily, pollination is by water:
$IV-$ The primary endosperm nucleus is tripoid.

The $R.Q$ of above reaction is
$(i)$ 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 $ATP$.