Filaments in which sealariform conjugation occur are homothallic

Filaments in which lateral conjugation occur are heterothallic

A sexual reproduction occurs by zoospores

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Plant kingdom practice · Medium

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Showing 31-60 of 181 questions

31 Medium

31 of 181

Understanding +4 | -1

A newly discovered plant was found to be a gymnosperm because it

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Correct option: A

Lacks ovary but possesses exposed ovules

Option A (Lacks ovary but possesses exposed ovules) is correct because the defining characteristic of gymnosperms is the presence of naked ovules, not enclosed within an ovary.

32 Medium

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In Spirogyra,

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Correct option: A

Filaments in which lateral conjugation occur are homothallic

Option A (Filaments in which lateral conjugation occur are homothallic) is correct because in Spirogyra, lateral conjugation occurs within the same filament (homothallic).

33 Medium

33 of 181

Remembering +4 | -1

In Spirogyra the sporophytic stage is dominant

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Correct option: B

FALSE

Option B is correct because Spirogyra exhibits a haplontic life cycle, where the dominant stage is the gametophyte (n), not the sporophyte (2n).

34 Medium

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Which of the following is the difference between a monocotyledonous and a dicotyledonous plant?

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Correct option: C

Monocot have one cotyledons whereas dicot have two cotyledons

Option C (Monocot have one cotyledons whereas dicot have two cotyledons) is correct because the primary difference between monocots and dicots lies in the number of cotyledons present in their seeds.

35 Medium

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Understanding +4 | -1

Which one example behaves like a master and slave relationship?

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Correct option: D

Algae and Fungi

Option D (Algae and Fungi) is correct because in lichens, the relationship between algae and fungi often resembles a master-slave dynamic where the fungus provides structure and the algae provides food.

36 Medium

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Understanding +4 | -1

Choose the correct statement about liverworts
I. In liverworts sexual reproduction occurs by the fusion of antherozoids and egg, which are produced in anthridium and archegonium, respectively
II. Both male and female sex organs may be present on same thalli or different thalli
III. Zygote give rise to sporophyte, which is differentiated into food, seta and capsule
IV. Some cells of capsule undergoes meiosis and give rise to haploid spores

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Correct option: D

I, II, III and IV

Option D (I, II, III and IV) is correct because all the statements accurately describe the characteristics of liverworts.

37 Medium

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Remembering +4 | -1

Embryo sac consists of

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Correct option: D

All of the above

Option D (All of the above) is correct because the embryo sac in angiosperms contains one egg cell, two synergids, three antipodal cells, and two polar nuclei.

38 Medium

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Remembering +4 | -1

In liverworts asexual reproduction takes place by

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Correct option: A

Gemmae and fragmentation of thalli

Option A (Gemmae and fragmentation of thalli) is correct because liverworts reproduce asexually through gemmae formation and fragmentation of their thallus.

39 Medium

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Analyzing +4 | -1

[A]: Monotrapa is a parasitic plant.

[R]: It does not show proper mycorrhizal association.

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Correct option: B

Both A and R are true and R is not the correct explanation of A

Option B (Both A and R are true and R is not the correct explanation of A) is correct because Monotropa is indeed a parasitic plant, and while it associates with mycorrhizae, the association is not proper in the sense of being mutually beneficial; however, the latter doesn't directly explain the former.

40 Medium

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Understanding +4 | -1

Conifers are adapted to tolerate extreme environmental conditions because of

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Correct option: D

thick cuticle

Option D (thick cuticle) is correct because the thick cuticle helps conifers reduce water loss in harsh environments.

41 Medium

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Remembering +4 | -1

Cyanobacterium is an algae having

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Correct option: A

Blue-green pigment

Option A (Blue-green pigment) is correct because cyanobacteria, also known as blue-green algae, contain blue-green pigments (phycocyanin and chlorophyll a).

42 Medium

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Remembering +4 | -1

The only living fossil, known by the name of ‘maiden hair tree’ is

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Correct option: C

Ginkgo

Option C (Ginkgo) is correct because Ginkgo biloba is the only living species of its genus and is often referred to as a living fossil or maidenhair tree.

43 Medium

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Understanding +4 | -1

In angiospermic fertilisation, one male gamete fuses with egg to form …A… , this event is called …B… .
Identify A and B and choose the correct option

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Correct option: B

A-zygote; B-syngamy

Option B (A-zygote; B-syngamy) is correct because in angiospermic fertilization, one male gamete fuses with the egg to form a zygote, and this process is called syngamy.

44 Medium

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Remembering +4 | -1

Double fertilisation occurs among

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Correct option: C

Angiosperms

Option C (Angiosperms) is correct because double fertilization, involving the fusion of two sperm nuclei with the egg cell and polar nuclei, is a unique characteristic of angiosperms.

45 Medium

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Remembering +4 | -1

Phycoerythrin is present in

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Correct option: A

Polysiphonia

Option A (Polysiphonia) is correct because Phycoerythrin is a red pigment found in red algae like Polysiphonia.

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46 Medium

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Remembering +4 | -1

In Pinus, the endosperm is

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Correct option: A

Haploid

Option A (Haploid) is correct because the endosperm in gymnosperms like Pinus is formed before fertilization and is therefore haploid (n).

47 Medium

47 of 181

Remembering +4 | -1

Moss capsule represents a

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Correct option: B

Sporophyte

Option B (Sporophyte) is correct because the moss capsule is the spore-bearing structure, which is part of the sporophyte generation in mosses.

48 Medium

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Remembering +4 | -1

Which of the following liverworts have thalloid plant body?

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Correct option: A

Marchentia

Option A (Marchentia) is correct because Marchantia is a liverwort with a thalloid plant body, meaning it has a flat, undifferentiated structure.

49 Medium

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Understanding +4 | -1

Select the correct statements.

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Correct option: C

Pinus seeds cannot germinate and establish without the presence of mycorrhizae

Option C (Pinus seeds cannot germinate and establish without the presence of mycorrhizae) is correct because Pinus seeds require a symbiotic relationship with mycorrhizae for nutrient uptake and successful germination.

50 Medium

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Remembering +4 | -1

Isogamy is found in

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Correct option: C

Both (a) and (b)

Option C (Both (a) and (b)) is correct because isogamy, the fusion of morphologically similar gametes, is found in both Spirogyra and Chlamydomonas.

51 Medium

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Remembering +4 | -1

In algae the flagellate (motile) spore is called

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Correct option: C

Zoospore

Option C (Zoospore) is correct because zoospores are flagellated, motile spores produced by algae and some fungi.

52 Medium

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Remembering +4 | -1

Which one of the following is an example of chlorophyllous thallophyte?

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Correct option: B

Spirogyra

Option B is correct because Spirogyra is a filamentous green alga (Chlorophyceae) and thus a chlorophyllous thallophyte.

53 Medium

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Understanding +4 | -1

Assertion: Algin is obtained from algae.

Reason: Rust of wheat is due to Puccinia.

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Correct option: B

If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion

Option B (If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion) is correct because algin is obtained from algae, and rust of wheat is due to Puccinia, but these two facts are unrelated.

54 Medium

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Remembering +4 | -1

Phylogenetic system of classification was given by

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Correct option: A

Engler and Prantl

Option A (Engler and Prantl) is correct because Engler and Prantl developed the phylogenetic system of classification, which is based on evolutionary relationships.

55 Medium

55 of 181

Understanding +4 | -1

Which of the following in moss capsule is haploid/gametophytic tissue?

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Correct option: B

Calyptra and spore

Option B (Calyptra and spore) is correct because the calyptra is derived from the gametophyte and the spore is the first cell of the gametophytic generation.

56 Medium

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Analyzing +4 | -1

Which of the following feature is correct for amphibian archegoniatae but wrong for amphibian tracheophytes?

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Correct option: B

Parasitic sporophyte

Option B (Parasitic sporophyte) is correct because bryophytes have a parasitic sporophyte (dependent on the gametophyte for nutrition), while pteridophytes have an independent sporophyte.

57 Medium

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Remembering +4 | -1

Which group of plant constitute the lower bryophytes?

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Correct option: A

Liverworts

Option A (Liverworts) is correct because liverworts are considered more primitive than mosses and are often classified as lower bryophytes due to their simpler structure.

58 Medium

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Understanding +4 | -1

Liverworts differ from mosses in their?

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Correct option: B

Structure of plant body

Option D (All of these) is incorrect. Option A (Rhizoids) is incorrect. Option B (Structure of plant body) is correct because liverworts and mosses have different structures of their plant bodies. Liverworts have a thalloid or leafy structure, while mosses have a more differentiated structure with stem-like and leaf-like parts.

59 Medium

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Remembering +4 | -1

Tallest flowering tree is

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Correct option: D

Eucalyptus

Option D (Eucalyptus) is correct because Eucalyptus regnans is known to be the tallest flowering tree species in the world.

60 Medium

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Remembering +4 | -1

Heterocysts are found in

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Correct option: A

Cyanophyceae

Option A (Cyanophyceae) is correct because heterocysts, specialized cells for nitrogen fixation, are found in cyanobacteria (Cyanophyceae).

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