Home
Current Affairs January 2024

What is the correct answer?

4

Which of the following branch of science is being described by the given statements ?
(i) It can easily done by using computers based on all observable characters.
(ii) Numbers and codes are assigned to all the characters and the data are then processed.
(iii) Each character is given equal weightage and at the same time hundred of characters can be considered.

A. Cytotaxonomy

B. Numerical taxonomy

C. Chemotaxonomy

D. ??-taxonomy

Correct Answer :

B. Numerical taxonomy


Related Questions

What is the correct answer?

4

Fusion of two gametes which are dissimilar in size is termed as _______.

A. isogamous

B. oogamous

C. anisogamous

D. agamous

What is the correct answer?

4

Which of the following statements (i) - (v) are correct ?
(i) In Equisetum, the female gametophyte is retained on the parent sporophyte.
(ii) In Ginkgo, male gametophyte is not independent.
(iii) The sporophyte in Riccia is more developed than that in Polytrichum.
(iv) Sexual reproduction in Volvox is isogamous.

A. Two

B. Three

C. Four

D. One

What is the correct answer?

4

Which of the following pteridophytes belong to class pteropsida?

A. Equisetum and Psilotum

B. Lycopodium and Adiantum

C. Selaginella and Pteris

D. Pteris and Adiantum

What is the correct answer?

4

_______ represent the reproductive organs amongst gymnosperms.

A. Prothallus

B. Capsules

C. Setae

D. Cones

What is the correct answer?

4

Fern plant is a

A. haploid gametophyte

B. diploid gametophyte

C. diploid sporophyte

D. haploid sporophyte

What is the correct answer?

4

Which one of the following is the major difference between mosses and ferns ?

A. Ferns lack alternation of generation while mosses show the same.

B. Mosses are facultative aerobes while ferns are obligate aerobes.

C. Vascular bundles of ferns show xylem vessels while those of mosses lack it.

D. Sporophytes of ferns live much longer as compared to the sporophytes of mosses.

What is the correct answer?

4

Which of the following statement(s) is/are correct ?

A. In angiosperms, each embryo sac has a three-celled egg apparatus one egg cell and two synergids, three antipodal cells and two polar nuclei.

B. All seed bearing plants i.e., gymnosperms and angiosperms follow dipontic life patterns of plants.

C. In gymosperms, roots in some genera have fungal association in the form of mycorrhiza (Pinus) while in some others (Cycas) small specialized roots called coralloid are associated with N2 fixing cyanobacteria.

D. All of the above

What is the correct answer?

4

Which of the following class of algae is mostly found in salt water ?

A. Phaeophyceae

B. Rhodophyceae

C. Chlorophyceae

D. Both (a) and (b)

What is the correct answer?

4

Mosses are of great ecological importance because of

A. its contribution to prevent soil erosion.

B. its contribution in ecological succession.

C. its capability to remove CO from the atmosphere.

D. both (a) and (b)

What is the correct answer?

4

Match the classes of pteridophytes given in column I with their examples given in column II and choose the correct option
Column -IColumn-II
(Classes of pteridophytes)(Examples)
A. PsilopsidaI. Selaginella
B. LycopsidaII. Psilotum
C. SphenopsidaIII. Dryopteris
D. PteropsidaIV. Equisetum

A. A II; B I; C IV; D III

B. A I; B II; C IV; D III

C. A II; B I; C III; D IV

D. A II; B IV; C I; D III

What is the correct answer?

4

Read the following statements and choose the correct option.
(i) In rhodophyceae, food is stored in the form of mannitol and laminarin.
(ii) The ovules of gymnosperms are not enclosed by ovary wall.
(iii) Salvinia is heterosporous.
(iv) In the diplontic life-cycle, the free living gametophyte represents the dominant phase.

A. (ii) and (iii) are correct but (i) and (iv) are incorrect.

B. (ii) and (iv) are correct but (i) and (iii) are incorrect.

C. (iii) and (iv) are correct but (i) and (ii) are incorrect.

D. (i) and (ii) are correct but (iii) and (iv) are incorrect.

What is the correct answer?

4

Refer the following statement(s) and identify the group of plant which is being described by given statements ?
(i) They include various mosses and liverworts that are found commonly growing in moist shaded areas in the hills.
(ii) They lack true roots, stem or leaves.
(iii) The main plant body is haploid.
(iv) They produce a multicellular body sporophyte which is not free living but attached to the photosynthetic gametophyte and derives nourishment from it.

A. Algae

B. Fungi

C. Bryophytes

D. Pteridophytes

What is the correct answer?

4

Consider the following statements regarding the major pigments and stored food in the different groups of algae and choose the correct option
(i) In chlorophyceae, the stored food material is starch and the major pigments are chlorophyll-a and d.
(ii) In phaeophyceae, laminarian is the stored food and major pigments are chlorophyll-a and b.
(iii) In rhodophyceae, floridean starch is the stored food and the major pigments are chlorophyll-a, d and phycoerythrin.

A. (i) is correct, but (ii) and (iii) are incorrect

B. (i) and (ii) are correct, but (iii) is incorrect

C. (i) and (iii) are correct, but (ii) is incorrect

D. (iii) is correct, but (i) and (ii) are incorrect

What is the correct answer?

4

Cytological information like chromosome number, structure, behaviour are related with

A. numerical taxonomy

B. cytotaxonomy

C. chemotaxonomy

D. all of the above

What is the correct answer?

4

Which one of the following term is correctly matched with their definition in Pinus ?

A. Monoecious Male (microsporangiate) and female (megasporangiate) cones are produced on same plant.

B. Monoecious Male and female sporophylls borne on same strobilus.

C. Dioecious Male and female cones are produced on different plants.

D. Monoecious Micro and megasporocarp develop on same plant.

What is the correct answer?

4

Cycas and Adiantum resemble each other in having

A. seeds

B. motile sperms

C. cambium

D. vessels

What is the correct answer?

4

In bryophytes, male and female sex organs are called ______ and ______ respectively.

A. microsporangia; macrosporangia

B. male strobili; female strobili

C. antheridia; archegonia

D. androecium; gynoecium

What is the correct answer?

4

Match column-I with column-II and select the correct answer using the codes given below.
Column-IColumn-II
(Group of Planet Kingdom)(Examples)
A. AlgaeI. Solanum tuberosum
B. FungiII. Equisetum
C. AngiospermIII. Cycas
D. PteridophyteIV. Chlamydomonas
E. GymnospermV. Rhizopus

A. A V; B IV; C I; D II; E III

B. A IV; B V; C I; D II; E III

C. A IV; B I; C V; D II; E III

D. A IV; B I; C V; D III; E II

What is the correct answer?

4

Match column-I with column-II and choose the correct option.
Column-IColumn-II
A. PhaeophyceaeI. Have an elaborate mechanism of spore dispersal
B. RhodophyceaeII. first terrestrial plant with vascular tissue-phloem and xylem
C. MossesIII. Asexual reproduction by biflagellate zoosposes
D. PteridophytesIV. Polysiphonia, Porphyra, Gracilaria

A. A III; B IV; C I; D II

B. A IV; B III; C I; D II

C. A IV; B III; C II; D I

D. A IV; B I; C III; D II

What is the correct answer?

4

Classification of plants proposed by Carolus Linnaeus was artificial because it was based on

A. only a few morphological characters.

B. evolutionary tendencies which are diverse.

C. anatomical characters which are adaptive in nature.

D. physiological traits alongwith morphological characters.

What is the correct answer?

4

In class phaeophyceae, the plant body is usually attached to the substratum by a A and has a stalk, the B and leaf like photosynthetic organ-the C .

A. A holdfast, B stipe, C frond

B. A stipe, B holdfast, C frond

C. A frond, B stipe, C holdfast

D. A stipe, B frond, C holdfast

What is the correct answer?

4

Chemotaxonomy is connected with

A. classification of chemicals found in plants.

B. use of phytochemical data in systematic botany.

C. application of chemicals on herbarium sheets.

D. use of statistical methods in chemical yielding plants.

What is the correct answer?

4

Deep in the tropical rain forest, a botanist discovered an unusual plant with vascular tissues, stomata, a cuticle, flagellated sperm, conelike reproductive structures bearing seeds, and an alternation-of-generations life cycle. He was very excited about this discovery because it would be rather unusual for a plant to have both

A. a cuticle and flagellated sperm.

B. vascular tissues and alternation of generations.

C. seeds and flagellated sperm.

D. alternation of generations and seeds.

What is the correct answer?

4

Moss peat is used as a packing material for sending flowers and live plants to distant places because

A. it reduces transpiration.

B. it serves as a disinfectant.

C. it is easily available.

D. it is hygroscopic.

What is the correct answer?

4

Match the column I with column II and choose the option which shows its correct combination.
Column-IColumn-II
(Pattern of life cycle in plant)(Examples)
A. HaplonticI. Bryophytes, Pteridophytes, life cycle Ectocarpus, Polysiphonia, Kelps
B. DiplonticII. Seed bearing plants life cycle (Gymnosperm and Angiosperm), Fucus
C. Haplo-diplonticIII. Many algae (Volvox, life cycle Spirogyra) and some species of Chlamydomonas

A. A III; B II; C I

B. A I; B II; C III

C. A II; B I; C III

D. A III; B I; C II

What is the correct answer?

4

Match column-I with column-II and choose the correct option.
Column-IColumn-II
A. Amphibian of theI. Sphagnum plant kingdom
B. Specialized structuresII. Angiosperms in liverworts for asexual reproduction
C. Monocotyledons andIII. Bryophytes dicotyledons
D. A plant which hasIV. Gemmae capacity to holding water

A. A III; B IV; C I; D II

B. A III; B IV; C II; D I

C. A IV; B III; C II; D I

D. A III; B II; C IV; D I

What is the correct answer?

4

A student was given a sample to observe under the microscope. He observed and found that the sample is the most common type of spore involved in asexual reproduction in algae. Identify the spore.

A. Zoospore

B. Endospore

C. Hypnospore

D. None of the above

What is the correct answer?

4

Which of the following statements are incorrect?

A. Pyrenoids contain protein besides starch.

B. Sexual reproduction may be isogamous, oogamous and anisogamous in green and brown algae.

C. Some of the members of algae also occur in association with fungi (lichen) and animals (eg, on sloth bear).

D. The leaves in pteridophytes are well adapted to withstand extremes of temperature, humidity and wind.

What is the correct answer?

4

Which of the following pair is incorrectly matched ?

A. Chlorophyceae Major pigments are chl a and b.

B. Phaeophyceae Cell wall is made up of cellulose and algin.

C. Rhodophyceae Stored food is mannitol.

D. Chlorophyceae Cell wall is made up of cellulose.

What is the correct answer?

4

Which of the following statement(s) is incorrect about mosses ?

A. The predominant stage of its life cycle is the gametophyte which consists of two stages protonema and leafy stages.

B. Leafy stage are attached to the soil through unicellular and branched rhizoids.

C. Sex organs-antheridia and archegonia are produced at the apex of the leafy shoots.

D. All of the above