Home
Current Affairs January 2024

What is the correct answer?

4

Which of the following statements with respect to algae are correct.
(i) Fusion between one large, non-motile female gamete and a smaller, motile male gamete is termed as oogamous.
(ii) Fusion of two gametes dissimilar in size is termed as oogamous.
(iii) Fusion of two gametes similar in size is called anisogamous.
(iv) In chlorophyceae, the major pigments are chlorophyll a and b , and the food is stored as starch.
(v) In rhodophyceae, the major pigments are chlorophyll a and d , and the food is stored as mannitol.

A. (i) and (v)

B. (iii) and (v)

C. (i) and (ii)

D. (i) and (iv)

Correct Answer :

D. (i) and (iv)


Isogamous fertilization is the fusion of two similar gametes while anisogamous fertilization is fusion of two morphologically dissimilar motile gametes. In rhodophyceae, the major pigments are chlorophyll a and d but the stored food is floridean starch.

Related Questions

What is the correct answer?

4

Laminaria (Kelp) and Fucus (Rock weed) are examples of

A. green algae

B. brown algae

C. red algae

D. golden brown algae

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 statements with respect to gymnosperms and angiosperms is/are correct?
(i) The process of double fertilization is present in gymnosperms.
(ii) Angiosperms range in size from microscopic Wolffia to tall trees of Sequoia.
(iii) In gymnosperms, the seeds are not covered.
(iv) In gymnosperms, the male and female gametophytes have an independent free living existence. Of the above statements

A. (i) and (ii)

B. (iii) only

C. (ii) and (iii)

D. (iii) and (iv)

What is the correct answer?

4

Which of the following statement(s) is/are correct about gemmae ?
(i) These are specialised structures by which asexual reproduction take place in liverworts.
(ii) They are green, multicellular and asexual buds.
(iii) They develop in small receptacles called gemma cups.
(iv) They detach from parent body and germinate to form new individuals.

A. (i) and (ii)

B. (ii) and (iii)

C. (i), (ii) and (iii)

D. All of these

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

Which one of the following is a correct statement?

A. Pteridophyte gametophyte has a protonemal and leafy stage.

B. In gymnosperms, female gametophyte is free-living.

C. Antheridiophores and archegoniophores are present in pteridophytes.

D. Origin of seed habit can be traced in pteridophytes.

What is the correct answer?

4

A research student collected certain alga and found that its cells contained both chlorophyll a and chlorophyll d as well as phycoerythrin on the basis of his observation the students conclude that the alga belongs to

A. rhodophyceae

B. bacillariophyceae

C. chlorophyceae

D. phaeophyceae

What is the correct answer?

4

A universal feature of the life cycle of plants is

A. morphologically identical haploid and diploid stages.

B. genetically identical haploid and diploid stages.

C. alteration of generations between heteromorphic haploid gametophytes and diploid sporophytes.

D. none of the above

What is the correct answer?

4

Why rhodophyta exhibit a red colour ?

A. Since most rhodophyta grow at great depths, the chlorophyll can only absorb light in the red area of the spectrum.

B. The wavelengths of light that are absorbed by chlorophyll are passed to phycoerythrin (a red pigment).

C. Red pigment of rhodophyta absorbs all the light waves.

D. The light reaching the greatest depth in water is in the blue-green region of the spectrum, is absorbed by phycoerythrin.

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

Phylogenetic classification system is based on the

A. morphological characters of various organisms.

B. anatomical characters of various organisms.

C. physiological characters of various organisms.

D. evolutionary relationships between the various organisms.

What is the correct answer?

4

Which of the following statement(s) is/are correct about pteridophytes ?
(i) The main plant body is a sporophyte which is differentiated into true roots and leaves.
(ii) The leaves are small (microphylls) as in ferns or large (macrophylls) as in Selaginella.
(iii) Genera like Selaginella and Salvinia which produce two kinds of sporesmacro (large) and micro (small) spores, are known as heterospores.
(iv) Common examples are Funaria, Polytrichum and Sphagnum.

A. Both (i) and (ii)

B. Both (ii) and (iii)

C. Both (i) and (iii)

D. All of these

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

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

You are given an unknown plant to study in the laboratory. You find that it has chlorophyll, no xylem. Its multicellullar sex organs are enclosed in a layer of jacket cells. Its gametophyte stage is free living. The plant probabily belongs to

A. chlorophyceae

B. bryophyte

C. pteridophyte

D. gymnosperm

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

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

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

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 statement is incorrect ?

A. Double fertilization is unique to gymnosperms and monocotyledons.

B. Sequoia, a gymnosperm, is one of the tallest tree species.

C. Phaeophyceae members possess chlorophyll a, c, carotenoids and xanthophylls.

D. Moss is a gametophyte which consists of two stages namely, protonemal stage and leafy stage.

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

What is the correct answer?

4

What is the number and position of insertions of flagella in rhodopyceae class of algae ?

A. 2 - 8, equal, apical

B. 2, unequal, lateral

C. 2 - 6, equal, lateral

D. Absent

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

Flagellate isogametes and anisogametes are found in

A. Spirogyra

B. Fucus

C. Volvox

D. Chlamydomonas

What is the correct answer?

4

The following statements are associated with one class of algae. Identify the class of algae.
(i) One or more storage bodies called pyrenoids located in the chloroplasts are present in the members of this class.
(ii) They have a rigid cell wall made of an inner layer of cellulose and an outer layer of pectose.
(iii) Asexual reproduction is by flagellated zoospores produced in zoosporangia.
(iv) Chlamydomonas, Volvox, Ulothrix, Spirogyra and Chara are commonly found members of this class.

A. Chlorophyceae

B. Rhodophyceae

C. Phaeophyceae

D. None of these

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

If you are asked to classify the various algae into distinct groups then which of the following characters you should choose for the classification ?

A. Nature of habitat

B. Structural organization of thallus

C. Chemical composition of the cell wall

D. Types of pigments present in the cell.

What is the correct answer?

4

Which of the following class of algae is rarely found in fresh water ?

A. Chlorophyceae

B. Phaeophyceae

C. Rhodophyceae

D. Both (a) and (b)

What is the correct answer?

4

Which of the following statement(s) is/are correct about angiosperms ?
(i) In angiosperms or flowering plants, the pollen grains and ovules are developed in specialised structure called flowers.
(ii) They are divided into two classes : the dicotyledons and the monocotyledons.
(iii) The male sex organ in a flower is the pistil or the carpel.
(iv) The female sex organ is the stamen.

A. Only (i)

B. Both (i) and (ii)

C. Both (ii) and (iv)

D. All of these

What is the correct answer?

4

Mosses do not have true leaves because their leaf-like structures lack

A. starch in their chloroplast.

B. vascular tissues.

C. chlorophyll.

D. cellulose in their cell walls.