FREE NEET Biology Practice MCQ Test: Plant Kingdom Exercise 2 Questions Answers With Detailed Explanations [PDF]

Answer: (d)

Bryophytes neither have pollen nor flowers and rely on water to carry the male gametes (sperm) to the female gametes (eggs). The antherozoids (male gametes of pteridophytes) are armed with hair-like or whip-like cilia or flagellae and are able to swim through water; they do not travel great distances and are only released when free water is available.

Answer: (a)

Answer: (a)

Answer: (b)

Answer: (b)

Cephaleuros virescens grows as a parasite on the leaves of tea and causes red rust of tea. It is the common intercellular parasitic algae of chlorophyceae.

Answer: (b)

Algae, bryophyte and pteridophyte are cryptogams, but out of them algae, and bryophytes are lower cryptogams and do not possess vascular tissue (xylem and phloem), whereas in pteridophytes, vascular tissue system is well developed and so these are higher cryptogams or vascular cryptogams. The term cryptogams means that these plants reproduce by means of spores and do not produce seeds. The vascular tissue of pteridophytes is well developed. They contain both xylem and phloem. In xylem, vessels are absent and in phloem companion cells are absent. So pteridophytes or vascular cryptogams are a group of seedless vascular plants, that have successfully invaded the land and reproduce by means of spores. Gymnosperms are naked seed bearing plants called phanerogams.

Answer: (a)

In Pinus/gymnosperms, endosperm is produced before fertilization and hence it is haploid. Megaspore and pollen grains are structures of male gametophytes and it is also haploid.

Answer: (c)

Answer: (a)

Answer: (b)

The life cycle of an angiosperm is defined by the formation of the seed and its development to a fullgrown plant which, in turn, produces seeds. Angiosperms are vascular plants with flowers that produce seeds enclosed in an ovule—a fact that is recognized as the angiospermic condition.

Answer: (c)

Answer: (c)

The leaves are small (microphyll) as in Selaginella or large (macrophyll) as in ferns. Funaria, Polytrichum and Sphagnum are common examples of mosses.

Answer: (d)

Spirogyra is a freshwater green alga which belongs to Class Chlorophyceae. The sexual reproduction in Spirogyra is called conjugation. It involves the fusion of two morphologically identical but physiologically dissimilar non-ciliated gametes.

For development of gametes, some of the cells start to act like male and female gametangia in which the cell contents become separated from the cell wall, shrink and ultimately forms gametes. The fusion of these gametes takes place by scalariform conjugation or lateral conjugation.

Answer: (a)

Ectocarpus possesses haplodiplontic whereas Fucus possesses diplontic life cycle.

Answer: (c)

Answer: (c)

Double fertilization is a unique feature exhibited only by angiosperms. It involves both syngamy and triple fusion

Answer: (a)

Answer: (a)

Answer: (c)

Answer: (b)

The product of conjugation in Spirogyra or fertilization of Chlamydomonas is zygospore. Both are the members of green algae where gametes are fused to form zygote which develops into a thick walled zygospore.