Explore topic-wise InterviewSolutions in .

This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.

351.

Study the following statements and choose the correct option. I. Asexual reproduction is common among single celled organisms and organisms with relatively simple organisation II. Conidia, bud, gemmules are common sexual structures III. Runner, rhizome, sucker, tuber, offset, bulb are vegetative propagules IV. The invasive weeds found growing in fresh water bodies is Zostera.A. I, II are correctB. III, IV are correctC. I, III are correctD. II, IV are correct

Answer» Correct Answer - C
352.

Isogamous condition whit non-flagellated gametes is found in :A. VolvoxB. FucusC. SpirogayraD. Chlmydomans

Answer» Correct Answer - C
353.

Isogamous condition with non-flagellated gametes is found inA. SpirogyraB. VolvoxC. FucusD. Chlamydomonas

Answer» Correct Answer - A
354.

Which of the following flowers only once in its life-timeA. PapayaB. MangoC. JackfruitD. Bamboo species

Answer» Correct Answer - D
355.

Name an orgainsm where cell division in itself is a mode of reproduction

Answer» Asexual reproduction in amoeba and paramoecium.
356.

Name an alga that reproduce asexually through zoospores. Whya are these reproductive units so called?

Answer» Chlamydomonas , Zoopores are endogenously produced unicellular. Naked and motile spores with one or two flagella. These are produced in a sac-like structure called zoosporangium.
357.

Name a unicelluar fungi which reprodues asexually by budding.

Answer» Correct Answer - Yeast
358.

Which of the following propagates through leaf tipA. MarchantiaB. MossC. Walking fermD. Sprout - leaf plant

Answer» Correct Answer - C
Walking fern (Adiantum caudatum) because its leaf tips when come in contact with soil, form new plants as adventitious buds develop at leaf tips.
359.

Which of the following processes ensures the continutiy of life on earth?A. ReproductionB. RespirationC. DigestionD. Growth and development

Answer» Correct Answer - A
Reproduction is the process of formation of new individuals of a species from the pre-existing one. It is meant for perpetuation of a species because the older individuals of each species undergo senescence and die.
360.

Sexual mode of reproduction in protozoa isA. anisogamyB. plasmogamyC. plasmotomyD. schizogony

Answer» Correct Answer - A
Anisogamy is the type of sexual reproduction in which dissimilar garmetes fuse and form a diploid zygote, e.e. Plasmodium.
361.

How do roots take part in vegeative propagation ?

Answer» Modified tuberous roots, which possess b buds, serve as natural method of vegetative propagation. These roots develop leafy shoots (called slieps) aboveground and adventitious roots underground.
362.

Ramphotyphlops braminus produces females only by pathenogenesis. It is aA. snakeB. birdC. frogD. mammal

Answer» Correct Answer - A
363.

Give the significane of asexual reproduction.

Answer» The greatest advantage of asexual reproduction is that an orgnaism biotype (the original organism) can be retained and multiplied indefinitely without any change or variation. The variation are normally expected if organsim undergoes meiosis and syngamy.
364.

Differentiate between parthenocarpy and pathenogenesis. Give one example of each.

Answer» Parthencarpy is 'the formation of fruits without fertilization' whereas parthenogenesis is 'the formation of embryo from unfertilized egg'.
365.

The end of juvenile phase marks the beginning ofA. Vegetative phaseB. Reproduction phaseC. SenescenceD. Ageing

Answer» Correct Answer - B
366.

Name at least three changes seen in human males that are indicative of reproductive maturity.

Answer» 1. Body is smaller, less muscular and weaker. 2. Beard, moustache and chest hair lacking.
3. Skin is more hairy.
367.

Name at least three changes seen in human females that are indicative of reproductive maturity.

Answer» 1. Body is smaller, less muscular and stronger. 2. Beard moustanche and chest hair lacking.
3. Breasts very well developed.
368.

Choose correct option w.r.t. features of different plant groupsA. `{:(,"Group","Embryo","Gametes","Asexual spore"),((1),"Bryophytes","Present","Homogamete","Absent"):}`B. `{:(,"Group","Embryo","Gametes","Asexual spore"),((2),"Pteridophytes","Present","Homogamete","present"):}`C. `{:(,"Group","Embryo","Gametes","Asexual spore"),((3),"Ulothrix","Absent","Homogamete","present"):}`D. `{:(,"Group","Embryo","Gametes","Asexual spore"),((4),"Gymnosperms","Absent","Homogamete","present"):}`

Answer» Correct Answer - C
369.

Synchrony between the maturity of sexes and release of large number of gametes is shown byA. All spermatophytesB. All bryophytesC. Most of the algaeD. Most of the land plants

Answer» Correct Answer - C
370.

Which of the following plays an important role in controlling reproduction ? a. Day length b. Nervous system c. Endocrine systemA. c onlyB. b onlyC. b and c onlyD. a, b and c

Answer» Correct Answer - D
371.

Name the organism which exhibits regular annula alternation of sexes.

Answer» American oyster (Crassostrea virginica)
372.

Which of the following statements is not true ?A. Life span is the period from birth to the natural death of an organismB. All small organisms have very short life spanC. Life expectancy is the characteristic of populationsD. Maximum life span is the characteristic of species

Answer» Correct Answer - B
373.

Which internal systems, besides day length are meant to control reproduction in animals ?

Answer» Nervous system and endocrine system
374.

Name two pre-fertilization events

Answer» (i) Gametogenesis, (ii) Gamete transfer
375.

All of the following are pre-fertilisation events exceptA. SpermatogenesisB. OogenesisC. Gametes transferD. Embryogenesis

Answer» Correct Answer - D
376.

In all the sexually reproducing organisms, events involved areA. Same, sequentialB. Same, non-sequentialC. Different, sequentialD. Different, non-sequential

Answer» Correct Answer - A
377.

State true or false In most of the sexually reproducing organisms isogametes are formed

Answer» Correct Answer - False
378.

Chara possessA. Sex organs above nodesB. Multicellular and jacketed sex organsC. (Male) structure - Globule, (Female) - NuculeD. Both (2) & (3)

Answer» Correct Answer - D
379.

Give the ploidy of following structures in angiospermoc plants Zygote, Endosprm, OvumA. n,nn2nB. 2n,2n,nC. 2n,3n,nD. 2n,n,2n

Answer» Correct Answer - C
380.

Which of the following shows the sexual dimorphismA. Hydra and AscarisB. Hydra and oryctolagusC. Ascaris and PheretimaD. Ascaris and Oryctologus

Answer» Correct Answer - D
381.

Assertion: Asexual reproduction is also called blastogenesis Reason: In asexual reproduction there is no formation and fusion of gametesA. If both the assertion and the reason are true and the reason is a correct explanation of the assertionB. If both the assertion and reason are true but the reason is not a correct explanation of the assertionC. If the assertion is true but the reason is falseD. If both the assertion and reason is false

Answer» Correct Answer - B
Development of an organism from non sexual reproductive units like buds fragments etc. is called blastogenesis in asexual like buds fragments etc. is called blastogenesis in asexual reproduction there is no formation and fusion of gametes
382.

Assertion: Claspers of certilage fishes are analogous to penis of human male Reason: Both act as copulatory organs and transfer the sperms into femaleA. If both the assertion and the reason are true and the reason is a correct explanation of the assertionB. If both the assertion and reason are true but the reason is not a correct explanation of the assertionC. If the assertion is true but the reason is falseD. If both the assertion and reason is false

Answer» Correct Answer - A
Claspers of cartiliginous fishes (sharks) is one pair between the pelvic fins. Claspers are analogous to penis of human male both act as copulatory organ and transfer the sperm into female
383.

Rose plants produce large, attractive bisexual flowers, but they seldom produce fruits. On the other hand a tomato plant produces plenty of fruits though they have small flowers. Analyse the reasons for failure of fruit formation in rose.

Answer» Rose plants produce large, attractive bisexual flowers, but they seldom produce fruits. The reasons for failure of fruit formation in rose are as follows
(i) Rose plants may not produce viable pollens, hence, no fertilisation can take place.
(ii) Rose plants may not have functional eggs.
(iii) Rose plants may have defective and non-functional ovule, which is the female gametophyte generator.
(iv) There may be self-incompatibility.
(v) There may be internal barriers for pollen tube growth or fertilisation.
(vi) As rose plants are hybrids and reproduce vegetatively, there are chances for them to be sterile.
384.

The development of a sporophyte without fertilization from the vegetative cells of the gametophyte is calledA. ZygosporyB. AplanosporyC. AposporyD. Apogamy

Answer» Correct Answer - D
385.

In oogamy, fertilization involves :A. a large nommotile female gameter and a small motile male gameteB. a larege motile female gamete and a large motile male gameteC. a small nonmotile female gameter and a large motile male gameteD. a large nonmotile femle gamete and a small nonmotide male gamete

Answer» Correct Answer - A
386.

Development of an organism from female gamete/egg without involving fertilization isA. Adventitive embryonyB. PolyembryonyC. ParthenocarpyD. Parthenogenesis

Answer» Correct Answer - D
387.

Grafting in sugarcane can not be performed becauseA. vascular bundles are scatteredB. pholem is internal to xylemC. sugarcane plant is delicateD. it is unable to bear injury

Answer» Correct Answer - A
388.

In a grafted plant, stock has 48 chromosomes while scion has 24 chromosomes. The chromosome number for root cells and eggs areA. 48 and 24B. 24 and 24C. 24 and 12D. 48 and 12

Answer» Correct Answer - D
389.

A scion is grafted to a stock. The quality of fruits produced wiIl be determined by the genotype of -A. StockB. Scion Both stock and scion Neither stock or scionC.D.

Answer» Correct Answer - A
390.

Part of plant used for culturing is calledA. ScionB. ExplantC. StockD. Callus.

Answer» Correct Answer - B
391.

Tissue culture technique was first performed successfully byA. HaberlandtB. NobecourtC. WhiteD. Gautheret.

Answer» Correct Answer - C
392.

Tissue culture technique was first attempted byA. HaberlandtB. HanningC. NobecourtD. Gautheret.

Answer» Correct Answer - A
393.

Asexual reproduction involvesA. only maternal parentsB. only paternal parentsC. both a and bD. only one parent eigther paternal or maternal

Answer» Correct Answer - D
394.

Bud grafting is commonly used inA. LitchiB. PomegranateC. RoseD. Jasmine.

Answer» Correct Answer - C
395.

Bud grafting is commonly used inA. litchiB. pomegranateC. roseD. jasmine

Answer» Correct Answer - C
396.

IN grafting, scion formsA. shoot systemB. root systemC. new plantD. hybrid plant

Answer» Correct Answer - A
397.

Which type of reproduction is found in HydraA. PolyembryonyB. Sexual and asexualC. ParthenogesisD. Encystment

Answer» Correct Answer - B
Both sexual and asexual type of reproduction are found in Hydra
398.

Parthenogenesis occurs inA. AxolotlB. Miracidium and MetacercariaC. CercariaD. Sporocyst and redia

Answer» Correct Answer - D
399.

Natural parthenogenesis is found inA. aphidsB. honey beesC. waspsD. all the above

Answer» Correct Answer - D
400.

Natural parthenogenesis occurs inA. Frog to from femaleB. Honeybee to produce dronesC. CockroachD. Vegetarian eggs

Answer» Correct Answer - B
Parthenogenesis is the development of an individual from an unfertilized egg. In honey bees drones develop parthenogenetically