Free Plant Kingdom (Daily Quiz: 7) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Free Plant Kingdom (Daily Quiz: 7) Time:

Question-1

Kelps represent the group of

(a)

(b)

(c)

(d)


Question-2

Which one of the following is considered important in the development of seed habit?

(a)

(b)

(c)

(d)

Explanation:

Answer: (b)

The differentiation of spores into microspores and megaspores, and their dependence on the parent sporophyte for the nutrition, are certain features in the life cycle of Selaginella, which have been considered as the essential pre-requisties for the formation of seeds, characteristic of spermatophytes. It is generally agreed, that the seed plants arose from the heterosporous vascular plants that instead of discharging the megaspore acquired the habit of retaining it within the megasporangium.


Question-3

Cycas has two cotyledons but not included in angiosperms because of

(a)

(b)

(c)

(d)

Explanation:

Answer: (b)

Cycas belongs to Order Cycadales of gymnosperms because it has naked seed. It is not enclosed inside a fruit. It does not have double fertilization and so the endosperm formed is haploid in nature and not triploid. So it is not included in angiosperms as they have ovules (or seeds) produced inside fruit. This is the main difference between gymnosperms and angiosperms.


Question-4

Which of the following branch of science is being described by the given statements
  1. It can easily done by using computers based on all observable characters.
  2. Numbers and codes are assigned to all the characters and the data are then processed.
  3. Each character is given equal weightage and at the same time hundreds of characters can be considered.

(a)

(b)

(c)

(d)


Question-5

Auxospores and hormogonia are formed, respectively, by

(a)

(b)

(c)

(d)

Explanation:

Answer: (d)

Until 1907, auxospore formation was regarded as asexual process but now it is considered as an act of sexual process. The auxospores may be autogamous, isogamous, anisogamous or oogamous. Their pattern of formation differs in pennate and centric diatoms. Formation of hormogonia is the common method of reproduction in Nostoc which are produced by accidental breaking of trichome into several pieces. It may also be formed by death and decay of ordinary intercalary cells. Soon, the hormogonium escapes from mucilage and grows into a new filament and then into a new colony.


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