Leaf is the kitchen of the plant. Comment

Seeds are formed in angiosperms when male and female gametes get fused. But in some plants seeds are produced without the fusion of gametes. Comment

All part of the plant are not suited for making virus-free plants. Comment.

Sea is the greatest source of halogens. Comment.

Hess's law is a corollary of the first law of thermo dynamics. Comment.

Peptization is the reverse of precipitation comment on the statement.

Tadpole is ammonotelic while the frog is ureotelic. Comment on this statement.