Question 1

Sphenopsida class belongs to __________.

Accepted Answer

Pteridophytes are classified into four main classes: 1. Psilopsida (e.g., Psilotum) 2. Lycopsida (e.g., Selaginella, Lycopodium) 3. Sphenopsida (e.g., Equisetum) 4. Pteropsida (e.g., Dryopteris, Pteris, Adiantum) Therefore, the class Sphenopsida belongs to pteridophytes. Answer: pteridophytes

Question 2

In which one of the following, the ovules are not enclosed by an ovary wall and remain exposed ?

Accepted Answer

Gymnosperms are plants in which the ovules are not enclosed by any ovary wall and remain exposed, both before and after fertilization. Pinus is a gymnosperm, so its ovules are naked and remain exposed. Funaria is a bryophyte and Selaginella is a pteridophyte, both of which do not produce ovules or seeds. Wolffia is an angiosperm, in which the ovules are enclosed within an ovary wall. Answer: Pinus

Question 3

Given below are two statements : Statement I : In gymnosperms, the male and female gametophytes remain within the sporangia. Statement II : In gymnosperms, seeds are not covered. In the light of the a

Accepted Answer

In gymnosperms, unlike bryophytes and pteridophytes, the male and female gametophytes do not have an independent free-living existence. They remain within the sporangia retained on the sporophytes. Thus, Statement I is correct. The term gymnosperm literally means naked seeds (gymnos = naked, sperma = seeds). In these plants, the ovules are not enclosed by any ovary wall and remain exposed both before and after fertilization. The seeds that develop post-fertilization are not covered. Thus, Statem

Question 4

Which one of the following is the characteristic feature of gymnosperms?

Accepted Answer

The gymnosperms (Gymnos : naked, sperma seed) are plants in which the ovules are not enclosed by an ovary wall and remains exposed, both before and after fertilization. The seeds that develop post-fertilization, are not covered, i.e., naked.

Question 5

In bryophytes, the gemmae help in which one of the following?

Accepted Answer

Gemmae are green, multicellular, asexual buds which develop in small receptacles called gemma cups and help in asexual reproduction in bryophytes.

Question 6

The correct sequence of events in the life cycle of bryophytes is A. Fusion of antherozoid with egg. B. Attachment of gametophyte to substratum. C. Reduction division to produce haploid spores. D. For

Accepted Answer

The correct sequence of events in the life cycle of bryophytes is - Attachment of gametophyte to substratum. - Release of antherozoids into water. - Fusion of antherozoid with egg. - Formation of sporophyte. - Reduction division to produce haploid spores.

Question 7

Given below are the stages in the life cycle of pteridophytes. Arrange the following stages in the correct sequence. A. Prothallus stage B. Meiosis in spore mother cells C. Fertilisation D. Formation

Accepted Answer

In a pteridophytes life cycle, the correct sequence of stages will be given as follows: B Meiosis in spore mother cells A Prothallus stage D Formation of archegonia and antheridia in gametophyte E Transfer of antherozoids to the archegonia in presence of water C Fertilisation will occur So, the correct sequence is B A D E C

Question 8

Match List-I with List-II. array |l|l|l|l| & List-I & & List-II \ A . & Pteridophyte & (I) & Salvia \ B. & Bryophyte & (II) & Ginkgo \ C. & Angiosperm & (III) & Polytrichum \ D. & Gymnosperm & (IV

Accepted Answer

Pteridophyte - Salvinia Bryophyte - Polytrichum Angiosperm - Salvia Gymnosperm - Ginkgo

Question 9

Which one of the following is not found in Gymnosperms?

Accepted Answer

Gymnosperm lack vessels in their xylem. In place of companion cells they have albuminous cells. They lack sieve tube but have sieve cells.

Question 10

Which of the following is the correct match?

Accepted Answer

Option (1) is correct as Cedrus, Pinus and Sequoia belongs to gymnosperms. Option (2) is incorrect as Sequoia belongs to gymnosperms, not angiosperms. Option (3) is incorrect as Polysiphonia belongs to rhodophyceae (algae) not bryophytes. Option (4) is incorrect as Ginkgo belongs to gymnosperms, not pteridophytes.

Question 11

Identify the incorrect pair :

Accepted Answer

Equisetum belongs to Sphenopsida. Adiantum belongs to Pteropsida.

Plant Kingdom — Previous Year Questions & Solutions