Plant Kingdom Test

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Plant Kingdom Test - 74

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Weekly Quiz Competition

Question 1
1 / -0

Haplo-diplontic life cycle is found in ____________.

A
bryophytes

B
pteridophytes

C
fungi

D
both (a) and (b)

Solution

Haplo-diplontic type of life cycle involves the clear alternation of generations between a haploid gamete producing gametophyte and a diploid spore-producing sporophyte. Both bryophytes and pteridophytes exhibit this kind of life cycle pattern.
So the correct option is D.
Question 2
1 / -0

Heterospory is found in some members of _______ and all members of ______.

A
Bryophyta, Pteridophyta

B
Pteridophyta, Bryophyta

C
Bryophyta, Gymnospermae

D
Pteridophyta, Spermatophyta

Solution

Production of spores of two different sizes and sexes by the sporophytes of land plants is called as Heterospory. In the evolution of plants, Pteridophyta is intermediate between bryophytes and gymnosperms. All bryophytes are homosporous and all gymnosperms are heterosporous. Microspores and megaspores is a characteristic feature in the life cycle of a few members of Pteridophyta and all spermatophytes.
So the correct option is 'Pteridophyta, Spermatophyta.'
Question 3
1 / -0

A prothallus is

A
A structure in pteridophytes formed before the thallus develops

B
A sporophytic free living structure formed in pteridophytes

C
A gametophytic free living structure formed in pteridophytes

D
A primitive structure formed after fertilisation in pteridophytes
Solution
Correct Option: C
Explanation:
- Cryptograms are known as Pteridophyta.
- The dominant phase, in these plants, is sporophyte.
- This means a diploid multicellular stage in the present life cycle of a plant.
- The main body is differentiated into true stems, roots and leaves..
- Found in cool, damp, and shady places because of the need for water for fertilization.
- Some plant-like selaginella and Salvinia, possess micro and macro-sized spores and are termed heterosporous.
- The spore germinates and gives rise to small but multicellular free-living, inconspicuous, mostly photosynthetic thalloid gametophytes called prothallus.
Hence, A prothallus is a gametophytic-free living structure formed in pteridophytes.
Question 4
1 / -0

Holdfast, stipe and frond constitute the plant body in case of ______________.

A
Rhodophyceae

B
Chlorophyceae

C
Phaeophyceae

D
all of these

Solution

Phaeophyceae (Brown algae) are eukaryotic marine algae. The body consists of branched filamentous structure in lower forms {e.g. Ectocarpus) and parenchymatous structure in higher forms {e.g. Sargassum). The plant body is often differentiated into holdfast, stipe and lamina (frond). The lamina may be simple or divided variously and is photosynthetic.
So the correct option is C.
Question 5
1 / -0

In ________, a dominant and independent diploid sporophyte alternates with a short-lived, independent haploid gametophyte.

A
algae

B
bryophytes

C
pteridophytes

D
gymnosperms

Solution

ln pteridophytes, the diploid sporophyte is represented by a dominant, independent, photosynthetic, vascular plant body. It alternates with multicellular, saprophytic autotrophic, independent but short-lived haploid gametophyte.
So the correct option is C.
Question 6
1 / -0

Protonema is

A
Haploid and is found in mosses

B
Diploid and is found in liverworts

C
Diploid and is found In pteridophytes

D
Haploid and is found in pteridophytes

Solution

The predominant stage of the life cycle of a moss (bryophyte) is the gametophyte which consists of two stages. The first stage is the protonema stage, which develops directly from a spore. It is a creeping, green, branched and frequently filamentous stage. The second stage is the leafy stage, which develops from the secondary protonema as a lateral bud. It consists of upright, slender axes bearing spirally arranged leaves attached to the soil through multicellular and branched rhizoids. This stage bears the sex organs. So, the correct answer is 'Haploid and is found in mosses'.
Question 7
1 / -0

Read the given statements and select the correct option.
Statement 1 : Bryophytes show alternation of generation.
Statement 2 : A haploid gametophytic generation and a diploid sporophytic generation alternate in the life cycle.

A
Both statements 1 and 2 are correct.

B
Statement 1 is correct but statement 2 is incorrect.

C
Statement 1 is incorrect but statement 2 is correct.

D
Both statements 1 and 2 are incorrect.

Solution

Following are the correct statements:
(i) Bryophytes show alternation of generation.
(ii) A haploid gametophytic generation and a diploid sporophytic generation alternate in the life cycle.
So, the correct answer is (a).
Question 8
1 / -0

Refer to the following figures regarding Division Bryophyta
(i) 'A' are the androcyte mother cells of the antheridium, which give rise to a large number of biflagellate male gametes.
(ii) 'B' is the antheridial chamber and 'C' is the multicellular stalk of antheridium.
(iii) 'D' and 'E' respectively represent venter canal cells and neck canal cell of the female sex organ.
(iv) 'F' is the egg cell of the archegonium, which usually possesses several female gametes.
Which of the following combinations of above statements is incorrect?

A
(i) and (ii)

B
(iii) and (iv)

C
(ii) and (iii)

D
(i) and (iv)

Solution

The given figures belong to antheridium (male sex organ) and archegonium (female sex organ) of Marchantia (a bryophyte). A mature antheridium is an ovoid object raised on a short, multicellular stalk (labelled as Q. The stalk attaches the antheridium to the floor of the antheridia! chamber(labelled as B).The body of the antheridium has a jacket layer of sterile cells constituting its wall.
The latter encloses a mass of enterocyte mother cells(labelled as A). Androcyte mother cells give rise to a large number of biflagellate male gametes (sperms). The body of the archegonium consists of two parts, the venter (labelled as E) and the neck (labelled as D). The venter forms the swollen, basal portion of the archegonium.
It is continued into the long, slender, tubular neck. The venter consists of a wall of a single layer of sterile cells enclosing the venter cavity. The latter contains a small, upper ventral canal cell and a lower larger egg or ovum (labelled as F)
So the correct option is B.
Question 9
1 / -0

A phylogenetic tree or evolutionary tree is a branching diagram showing the inferred evolutionary relationships among various biological species. Which of the following phylogenies is correctly represented?

A

B

C

D
Question 10
1 / -0

Which of the following statements is incorrect regarding Bryophyta?

A
Zygote undergoes meiosis to produce sporophyte.

B
Zygote undergoes mitosis to form embryo proper.

C
Fertilisation takes place in presence of water.

D
Sporophyte is parasitic over gametophyte.
Solution
The zygote does not undergo meiosis to produce sporophytes, instead, they undergo mitotic division to form the embryo, which develops further into a diploid sporophyte.
Fertilization takes place in presence of water.
The sporophyte is parasitic over the gametophyte.
So, the correct answer is 'Zygote undergoes meiosis to produce sporophyte.'