NEET MCQs On Ageing and Death

Growth, Repair Regeneration Ageing And Death NEET Multiple Choice Questions

Question 1. A low statements describing certain features of reproduction are given below :

1. Gametic fusion takes place

2. Transfer of genetic material takes place

3. Reduction division takes place

4. Progeny has some resemblance with parents Select the options that are true for both asexual and sexual reproduction from the options given blow:

1. 1 and 3
2. 2 and 3
3. 2 and 4
4. 1 and 3

Answer: 3. 2 and 4

Question 2. The term ‘clone cannot be applied to offspring formed by sexual reproduction because :

1. Offspring do not possess exact copies of parental DNA.
2. DNA of only one parent is copied and passed on to the offspring
3. Offspring are formed at different times
4. DNA of parent and offspring are completely different.

Answer: Offspring do not possess exact copies of parental DNA.

Question 3. Amoeba and Yeast reproduce asexually by fission and budding respectively, because they are :

1. Microscopic organisms
2. Heterotrophic organisms
3. Unicellular organisms
4. Uninucleate organisms

Answer:  3. Unicellular organisms

Question 4. A few statements about sexual reproduction are given below :

1. Sexual reproduction does not always require two individuals
2. Sexual reproduction generally involves gametic fusion.
3. Meiosis never occurs during sexual reproduction
4. External fertilisation is a rule during sexual reproduction.

Choose the correct statements from the options below :

1. 1 and 4
2. 1 and 2
3. 2 and 3
4. 1 and 4

Answer:  2. 1 and 2

Question 5. A multicellular, filamentous alga exhibits a type of sexual life cycle in which the meiotic division occurs after zygote formation. The adult filament of this alga has

1. Haploid vegetative cells and diploid gametangia
2. Diploid vegetative cells and diploid gametangia
3. Diploid vegetative cells and haploid gametangia
4. Haploid vegetative cells and haploid gametangia

Answer:  4. Haploid vegetative cells and haploid gametangia

Question 6. The male gametes of rice plants have i2 chromosomes in their nucleus. The chromosome number in the female gamete, zygote and the cells of the seedling will be respectively.

1. 12, 24. 12
2. 24, 12, 12
3. 12. 24.24
4. 24, 12. 24

Answer: 3. 12. 24.24

Question 7. Given below are a few statements related to external fertilization. Choose the correct statements.

1. The male and female gametes arc formed an<i released simultaneously

2. Only a few gametes are released into the medium.

3. Water is the medium in a majority of organisms exhibiting external fertilization.

4. Offspring formed as a result of external fertilization have a better chance of survival than those formed inside an organism

1. 3 and 4
2. 1 and 3
3. 2 and 4
4. 1 and 4

Answer:  2. 1 and 3

Question 8. The statements given below describe certain features that are observed in the pistil of flowers.

1. Pistil may have many carpels

2. Each carpel may have more than one ovule

3. Each carpel has only one ovule

4. Pistil has only one carpel

Choose the statements that are true from the options below :

1. 1 and 2
2. 1 and 3
3. 2 and 4
4. 3 and 4

Answer:  1. 1 and 2

Question 9. Which of the following situations correctly describes the similarity between an angiosperm egg and a human egg?

1. Eggs of both are formed only once in a lifetime
2. Both the angiosperm egg and the human egg are stationary
3. Both the angiosperm egg and human egg are motile and transported
4. Syngamy in both results in the formation of zygote

Choose the correct answer from the options given below:

1. 2 and 4
2. 1 and 4
3. 3 and 4
4. 1 and 4

Answer:  2. 1 and 4

Question 10. The appearance of vegetat4e propagules from the nodes of plants such as sugarcane and ginger is mainly because:

1. Nodes are shorter than int models
2. Nodes have meristematic cells
3. Nodes are located near the soil
4. Nodes have non-photosynthetic cells

Answer: 2. Nodes have meristematic cells

Question 11. Which of the following statements, supports the view that elaborate sexual reproduction process appeared much later in the organic evolution?

1. Lower groups of organisms have a simpler body design

2. Asexual reproduction is common in lower groups

3. Asexual reproduction is common in higher groups of organisms

4. The high incidence of sexual reproduction in angiosperms and vertebrates.

Choose the correct answer from the options given below:

1. 1 and 2
2. 1 and 3
3. 2 and 4
4. 2 and 3

Answer: 3. 2 and 4

1. Question 12. Offspring formed by sexual reproduction exhibit more variation than those formed by asexual reproduction because:
2. Sexual reproduction is a lengthy process
3. Gametes of parents have qualitat4ely different genetic composition
4. Genetic material comes from parents of two different species
5. The greater amount of DNA is involved in sexual reproduction.

Answer:  3. Gametes of parents have qualitat4ely different genetic composition

Question 13. Choose the correct statement from among the following:

1. Dioecious (hermaphrodite) organisms are seen only in animals
2. Dioccies organisms are seen only in plants
3. Dioecious organisms are seen in both plants and animals
4. Dioecious organisms are seen only in vertebrates.

Answer: 4. Dioecious organisms are seen only in vertebrates.

Question 14. There is no natural death in single-celled organisms like Amoeba and bacteria because :

1. They cannot reproduce sexually
2. They reproduce by binary fission
3. The parental body is distributed among the offspring
4. They are microscopic

Answer: 2. They reproduce by binary fission

Question 15. There are various types of reproduction. The type of reproduction adopted by an organism depends on :

1. The habitat and morphology of the organism
2. Morphology of the organism
3. Morphology and physiology of the organisms
4. The organism’s habitat, physiology and genetic makeup

Answer:  1. The habitat and morphology of the organism

Question 16. Identify the incorrect statement.

1. In asexual reproduction, the offspring produced are morphologically and genetically identical to the parent
2. Zoospores are sexual reproduct4e structures
3. In asexual reproduction, a single parent produces offspring with or without the formation of gametes
4. Conidia are asexual structures in the Penicillium

Answer: 4. Conidia are asexual structures in Penicillium

Question 17. Which of the following is a post-fertilisation event in flowering plants?

1. Transfer of pollen grains
2. Embryo development
3. Formation of flower
4. Formation of pollen grains

Answer: 4. Formation of pollen grains

Question 18. The number of chromosomes in the shoot tip cells of a maize plant is shall be :

1. 20
2. 10
3. 40
4. 15

Answer:  3. 40

Question 19. Among the terms listed below those that are not correct names for a floral whorl are :

1. Androecium
2. Carpel
3. Corolla
4. Sepal
   1. 1 and 4
   2. 3 and 4
   3. 2 and 4
   4. 1 and 3

Answer:  3. 2 and 4

Question 20. The embryo sac is to ovule as is to an anther.

1. Stamen
2. Filament
3. Pollin grain
4. Androecium

Answer: 3. Pollin grain

Question 21. In a typically complete, bisexual and hypogynous flower, the arrangements of floral whorls on the thalamus from the outermost to the innermost is.

1. Calyx, corolla, androecium and gynoccium
2. Calyx, corolla, gynoecium and Androecium
3. Gynoecium, androecium, corolla and calyx
4. Androecium, gynoecium, corolla and calyx

Answer:  1. Calyx, corolla, androecium and gynoecium

Question 22. A dicotyledonous plant bears flowers but never produces fruits and seeds. The most probable cause for the above situation is:

1. The plant is dioecious and bears only pistillate flowers
2. The plant is dioecious and bears both pistillate and staminate flowers
3. Plant is monoecious
4. The plant is dioecious and bears only staminate flowers.

Answer: 4. Plant is dioecious and bears only staminate flowers

Question 23. The outermost and innermost wall layers of microsporangium in an anther arc respectively :

1. Endothecium and tapetum
2. Epidermis and endodermis
3. The epidermis and middle layer
4. Epidermis and tapetum

Answer: 4. Epidermis and tapetum

Question 24. During microsporogenesis, meiosis occurs in :

1. Endothecium
2. Microspore mother cells
3. Microspore tetrads
4. Pollen grains

Answer:  2. Microspore mother cells

Question 25. From among the sets of terms g4en below, identify those that are associated with the gynoecium.

1. Stigma, ovule, embryo sac, placenta
2. Thalamus, pistil, style, ovule
3. Ovule, ovary, embryo sac, tapetum
4. Ovule, stamen, ovary, embryo sac

Answer: 1. Stigma, ovule, embryo sac, placenta

Question 26. Starting from the innermost part, the correct sequence of parts in an ovule is:

1. Egg, nucellus, embryo sac, integument
2. Egg, embryo sac, nucellus, integument
3. Embryo sac, nucellus, integument, egg
4. Egg, integument, embryo sac, nucellus.

Answer: 2. Egg, embryo sac, nucellus, integument

Question 27. From the statements g4en below choose the option that is true for a typical female gametophyte of a flowering plant :

1. It is 8-nucleate and 7-celled at maturity

2. It is free-nuclear during the development

3. It situated inside the integument but outside the nucellus

4. It has an egg apparatus situated at the chalazal end

1. 1 and 4
2. 2 and 3
3. 1 and 2
4. 2 and 4

Answer: 3. 1 and 2

Question 28. Autogamy can occur in a chasmogamous flower if:

1. Pollen matures before the maturity of the ovule
2. Ovules mature before the maturity of pollen
3. Both pollen and ovules mature simultaneously
4. Both anther and stigma are of equal lengths.

Answer: 3.  Both pollen and ovules mature simultaneously

Question 29. Choose the correct statement from the following :

1. Cleistogamous flowers always exhibit autogamy
2. Chasmogamous flowers always exhibit geitonogamy
3. Cleistogamous flowers exhibit both autogamy and geitonogamy
4. Chasmogamous flowers never exhibit autogamy

Answer: 1. Cleistogamous flowers always exhibit autogamy

Question 30. A particular species of plant produces light, non-sticky pollen in large numbers and its stigmas are long and feathery. These modifications facilitate pollination by:

1. Insects
2. Water
3. Wind
4. Animals

Answer: 3. Wind

Question 31. From among the situations given below, choose the one that presents both autogamy and goitnogamy.

1. Monoecious plant boating unisexual flowers
2. Dioecious plant carrying male or female  flowers
3. Monoecious plant with bisexual flowers
4. Dioecious plant with bisexual flowers

Answer:  3. Monoecious plant with bisexual flowers

Question 32. In a fertilised  Sac the haploid. diploid anti tnploul stntctutvs atv :

1. Syergid, zygote and primary endosperm nucleus
2. Synergid ,antipodal and polar nuclei
3. Amiposlal, synergid and primary endosperm nucleus
4. Synergid, polar nuclei and zygote.

Answer: 1. Syergid, zygote and primary endosperm nucleus

Question 33. In an embryo sac. the cells that degenerate after fertilisation arc :

1. Syncrgids and primary endosperm cell
2. Synergids and antipodals
3. Antipodals and primary endosperm cell
4. Egg and antipodals

Answer: 2. Synergids and antipodals

Question 34. While planning for an artificial hybridization programme involving dioecious plants, which of the following steps would not be relevant:

1. Bagging of the female flower
2. Dusting of pollen on the stigma
3. Emasculation
4. Collection of pollen

Answer:  3. Emasculation

Question 35. In the embryos of a typical dicot and a grass, true homologous structures are :

1. Coleorhiza and coleoptile
2. Coleoptile and scutellum
3. Cotyledons and scutellum
4. Hypocotyl and radicle

Answer: 2. Coleoptile and scutellum

Question 36. The phenomenon observed in some plants wherein parts of the sexual apparatus are used for forming embryos without fertilisation is called :

1. Parthenocarpy
2. Apomixis
3. Vegetat4e propagation
4. Sexual reproduction

Answer:  2. Apomixis

Question 37. In a flower, if the megaspore mother cell forms megaspores without undergoing meiosis and if one of the megaspores develops into an embryo sac, its nuclei would be :

1. Haploid
2. Diploid
3. A few haploid and a few diploid
4. With varying ploidy.

Answer: 2. Diploid

Question 38. The phenomenon wherein, the ovary develops into a fruit without fertilisation is called :

1. Parthenocarpy
2. Apomixis
3. Asexual reproduction
4. Sexual reproduction

Answer: 1. Parthenocarpy

Question 39. Choose the incorrect statement from the following :

1. In birds and mammals, internal fertilisation takes place
2. Colostrum contains antibodies and nutrients
3. Polyspermy is prevented by the chemical changes in the surface of the egg
4. In the human female implantation occurs almost seven days after fertilisation

Answer:  3. Polyspermy is prevented by the chemical changes in the surface of the egg

Question 40. Identify the wrong statement from the billowing ;

1. High levels of oestrogen trigger the ovulatory phase
2. Oogoninl cells start to proliferate and g4e rise to ova in regular cycles from puberty onwards.
3. Sperms released from seminiferous tubules arc poorly motile/non-mobile
4. Progesterone levels are high during the post-ovulatory phase of the menstrual cycle.

Answer:  2. Oogoninl cells start to proliferate and g4e rise to ova in regular cycles from puberty onwards.

Question 41. Spot the odd one out from the following structures concerning the male reproductive system :

1. Rate lists
2. Epididymis
3. Vasa efferentia
4. Isthmus

Answer: 4. Isthmus

Question 42. Seminal plasma, the fluid part of semen, is contributed by,

1. Seminal vesicle

2. Prostate

3. Urethra

4. Bulbourethral gland

1. 1 and 2
2. 1, 2 and 4
3. 2, 3 and 4
4. 1 and 4

Answer: 2. 1, 2 and 4

Question 43. Spermiation is the process of the release of sperm from:

1. Seminiferous tubules
2. Vas deferens
3. Epididymis
4. Prostate gland

Answer: 1. Seminiferous tubules

Question 44. A mature Graafian follicle is generally present in the ovary of a healthy human female around :

1. 5 – 8 days of the menstrual cycle
2. 11-17 days of menstrual cycle
3. 18-23 days of the menstrual cycle
4. 24 – 28 days of the menstrual cycle

Answer:  2. 11-17 day of menstrual cycle

Question 45. The acrosomal reaction of the sperm occurs due to :

1. Its contact with zona pellucida of the ova
2. Reactions within the uterine environment of the female
3. Reactions within the epididymal environment of the male
4. Androgens produced in the uterus

Answer: 1. Its contact with zona pellucida of the ova

Question 46. Which one of the following is not a male accessory gland?

1. Seminal vesicle
2. Ampulla
3. Prostate
4. Bulbourethral gland

Answer: 2. Ampulla

Question 47. The immature male germ cell undergoes division to produce sperm by the process of spermatogenesis. Choose the correct one concerning the above.

1. Spermatogonia have 46 chromosomes and always undergo meiotic cell division
2. Primary spermatocytes d4ide by mitotic cell d4ision
3. Secondary spermatocytes have 23 chromosomes and undergo second meiotic division
4. Spermatozoa are transformed into spermatids

Answer: 3. Secondary spermatocytes have 23 chromosomes and undergo second meiotic division

Question 48. Which among the following has 2.3 chromosomes?

1. Spermatogonia
2. Zygote
3. Secondary oOcyte
4. Ogonia

Answer: 3. Secondary oOcyte

Question 49. Which of the following hormones is not secreted by the human placenta?

1. HCG
2. Estrogens
3. Progesterone
4. LH

Answer: 4. LH

Question 50. The vas deferens receives duct from the seminal vesicle and opens into the urethra as :

1. Epididymis
2. Ejaculatory duct
3. Efferent ductule
4. Ureter

Answer: 2. Enaculatory duct

Question 51. Urethral meatus refers to the following:

1. Urinogenital duct
2. Labia minora
3. Eimbriac
4. Infundibulum
5. Isthmus

Answer: 4. Infundibulum

Question 52. The method of directly injecting sperm into the ovum assisted by reproduct4e technology is called :

1. GIFT
2. ZIFT
3. ICSI
4. ET

Answer: 3. ICSI

Question 53. Increased iMR and decreased MMR in a population will:

1. Cause a rapid increase in the growth rate
2. Result in a decline in the growth rate
3. Not cause a significant change in the growth rate
4. Result in an explos4e population

Answer: 3. Not cause a significant change in growth rate

Question 54. Intensely lactating mothers do not generally conce4e due to the:

1. Suppression of gonadotropins
2. Hypersecretion of gonadotropin
3. Suppression of gametic transport
4. Suppression of fertilisation

Answer: 1. Suppression of gonadotropins

Question 55. Sterilization techniques are generally foolproof methods of contraception with least side effects. Yet, this is the last option for the couples because :

1. It is almost irreversible

2. Of the misconception that it will reduce sexual urge/ dr4e

3. It is a surgical procedure

4. Of lack of sufficient facilities in many parts of the country

Choose the correct option :

1. 1 and 3
2. 2 and 3
3. 2 and 4
4. 1, 2, 3 and 4

Answer: 4. 1, 2, 3 and 4