Plant Biology and Classification

Spirogyra is eutropic as it is highly rich in nutrients.

Scalariform conjugation leads to formation of a single Spirogyra strand.

The embryo sac has 8 nuclei.

The part of the embryo above the cotyledons is called epicotyl.

The term given to the undifferentiated tissue formed after triple fusion is endosperm.

The covering of the plumule is called coleoptile.

There are 5.1 million species of fungi that exist. Thus, it represents a group having the greatest number of species among global biodiversity.

The part of the embryo between the cotyledons and the embryonic root (Radicle) is called Hypocotyl.

The gymnosperms and angiosperms together compose the spermatophytes or seed plants.

Conifers form the largest group of living gymnosperms. Conifers have a total of 65-70 genera and 600-630 species.

Non-motile spores are formed in conifers.

Vessel elements are present in Gnetophytes. The vessels in the wood of gnetopsids are derived from tracheids with circular bordered bits, in contrast to the vessels of angiosperms, which are derived from scalariform tracheids.

Bennettitales are fossil gymnosperms.

Ovaries are absent in gymnosperms and thus, the seeds are naked.

The Pinaceae are always monoecious and include the common pines, firs, larches and spruces.