14620 + Mcqs in Biology Page 262 McqOptions

13051.	Which is secreted during allergic reaction?
A.	Histamine
B.	Neutrophils
C.	Basophils
D.	Acidophils
Answer» B. Neutrophils

Discussion

13052.	Which structure of man is similar to spiracle of cockroach?
A.	Nostril
B.	Bronchiole
C.	Lungs
D.	Alveoli
Answer» B. Bronchiole

Discussion

13053.	The inability to absorb digested nutrients may be due to damage of which type of epithelium?
A.	Ciliated columnar
B.	Simple columnar
C.	Simple squamous
D.	Simple cuboidal
Answer» C. Simple squamous

Discussion

13054.	Nerve cells do not possess:
A.	Neurilemma
B.	Sarcolemma
C.	Dendrite
D.	Axon
Answer» C. Dendrite

Discussion

13055.	Which of the following statement(s) is/are correct regarding cockroaches? (i) The body of the cockroach is segmented and divisible into three distinct regions - head, thorax and abdomen. (ii) Blood vascular system is of closed type. (iii) They are monoecious and both sexes have well developed reproductive organs. (iv) The development of P. americana is paurometabolus, meaning there is development through nymphal stage.
A.	(i) and (ii)
B.	(ii) and (iii)
C.	(i) and (iv)
D.	All of the above
Answer» D. All of the above

Discussion

13056.	In the given figure of areolar connective tissue, the different cells and parts have been marked by alphabets (1, 2, 3 & 4). Choose the answer in which these alphabets correctly match with the parts and cells they indicate.
A.	1-Adipocyte, 2-Collagen fibres, 3-Microfilament, 4-Mast cells
B.	1-Macrophage, 2-Collagen fibres, 3-Microfilament, 4-Mast cells
C.	1-Macrophage, 2-Collagen fibres, 3-Microtubule, 4-RBC
D.	1-Macrophage, 2-Fibroblast, 3-Collagen fibres, 4-Mast cells
Answer» E.

Discussion

13057.	Vitamin K is required for:
A.	Formation of thromboplastin
B.	Synthesis of prothrombin
C.	Conversion of fibrinogen to fibrin
D.	Conversion of prothrombin to thrombin
Answer» C. Conversion of fibrinogen to fibrin

Discussion

13058.	Which of the following tissue originates exclusively from the ectoderm of the embryo?
A.	Muscular tissue
B.	Epithelial tissue
C.	Nervous tissue
D.	Connective tissue
Answer» D. Connective tissue

Discussion

13059.	In the given diagram name the parts 1, 2, 3, 4 and 5.
A.	1-germpore,2-generadvecell,3-mtine,4-exine, 5 - vegetative cell
B.	1-germporc,2-generativecell,3-exine,4-mtine, 5 - vegetative cell
C.	1-mtine,2-exme,3-germpore,4-generativecell, 5 - vegetative cell
D.	1-exine, 2-intine, 3-vegetarivecell, 4-gemipore, 5 - generative cell
Answer» E.

Discussion

13060.	In a flowering plant, archesporium gives rise to:
A.	Only tapetum and sporogenous cells
B.	Only the wall of the sporangium
C.	Both wall and the sporogenous cells
D.	Wall and the tapetum
Answer» D. Wall and the tapetum

Discussion

13061.	The condition of maturation of stigma before anthers of the same flower is:
A.	Protandry
B.	Herkogamy
C.	Protogyny
D.	Prepotency
Answer» D. Prepotency

Discussion

13062.	3-celled stage of the mature male gametophyte is reached:
A.	Before pollination
B.	after pollination
C.	During fertilisation
D.	after fertilization
Answer» C. During fertilisation

Discussion

13063.	In cross self fertilised plants, the flowers are first emasculated. Which organ of the plant is removed in this process?
A.	Ovary
B.	Ovules
C.	Stigmas
D.	Stamens or anthers
Answer» E.

Discussion

13064.	An angiospermic plant has to produce 88 viable ovules. How many meiotic divisions will be needed to produce equal number of female gametophytes by this plant?
A.	88
B.	22
C.	44
D.	132
Answer» B. 22

Discussion

13065.	Identify 1, 2, 3, 4 and 5 structures shown in figure of a female gametophyte respectively.
A.	Antipodal cells, Central cell. Polar nuclei, Synergids and Acrosome
B.	Antipodal cells, Central cell, Polar nuclei, Synergids and Filiform apparatus
C.	Synergids, Central cell, Polar nuclei, Antipodal cells and Filiform apparatus
D.	Synergids, Megaspore mother cell, Polar nuclei, Synergids, Filiform apparatus
Answer» C. Synergids, Central cell, Polar nuclei, Antipodal cells and Filiform apparatus

Discussion

13066.	Central cell of embryo sac contains:
A.	A single haploid nucleus.
B.	Two haploid polar nuclei.
C.	One diploid fusion or secondary nucleus.
D.	Either [b] or [c]
Answer» E.

Discussion

13067.	As a pollen tube grows into the female organ, the nucleus that enters the synergid first is called the:
A.	Sperm nucleus
B.	Generative nucleus
C.	Tube nucleus
D.	Pollen nucleus
Answer» D. Pollen nucleus

Discussion

13068.	The given diagram refers to a T. S. of anther. Identify 1 to 5 respectively.
A.	Sporogenous tissue, tapetum, epidermis, middle layer, endothecium.
B.	Sporogenous tissue, epidermis, tapetum, middle layer, endothecium.
C.	Sporogenous tissue, epidermis, middle layer, tapetum, endothecium.
D.	Sporogenous tissue, tapetum, middle layer, epidermis, endothecium.
Answer» B. Sporogenous tissue, epidermis, tapetum, middle layer, endothecium.

Discussion

13069.	At the time of anther dehiscence:
A.	Middle layers develop fibrous thickenings.
B.	Epidermis degenerates.
C.	Endothecium develops fibrous thickenings.
D.	Endothecium degenerates.
Answer» D. Endothecium degenerates.

Discussion

13070.	The insect pollinated pollen grain, tapetum helps in the development of:
A.	Sporopollenin
B.	Cellulose
C.	Pectin
D.	Pollen kit
Answer» E.

Discussion

13071.	Isogamy is:
A.	Fusion of male and female gametes.
B.	Fusion of physiologically and morphologically similar gametes.
C.	Entry of pollen tube through integuments.
D.	None of the above
Answer» C. Entry of pollen tube through integuments.

Discussion

13072.	Which one of the following element is essential for the growth of pollen tube?
A.	Ca
B.	B
C.	Mg
D.	Mo
Answer» C. Mg

Discussion

13073.	Wall of mature pollen gram consists or:
A.	Ektexine and endexine
B.	Tapetum and endothecium
C.	Exine and inline
D.	Foot and baculate layer
Answer» D. Foot and baculate layer

Discussion

13074.	An example of a naturally occurring parthenocarpic fruit is:
A.	Guava
B.	Mango
C.	Banana
D.	Apple
Answer» D. Apple

Discussion

13075.	In a seed of maize, scutellum is considered as cotyledon because it:
A.	Protects the embryo.
B.	Contains food for the embryo.
C.	Absorbs food materials and supplies them to the embryo
D.	Converts itself into a monocot leaf.
Answer» D. Converts itself into a monocot leaf.

Discussion

13076.	Hybrid seeds have to be produced every year because:
A.	Hybrid plants become sterile in coming years.
B.	They show more heterosis in coming years
C.	Hybrid vigour is not maintained beyond on generation as segregation of genes begins in the second generation.
D.	Hybrid seed industry tends to increase cost of the seeds.
Answer» D. Hybrid seed industry tends to increase cost of the seeds.

Discussion

13077.	Cross-pollination is preferred over self pollination because:
A.	It results in better offspring
B.	The new varieties are formed
C.	It is easy
D.	Parthenogenesis can be induced
Answer» B. The new varieties are formed

Discussion

13078.	Vegetative nucleus occurs in:
A.	All flowering plants
B.	All seed plants
C.	All vascular plants
D.	All embryophytes
Answer» B. All seed plants

Discussion

13079.	Embryo sac is surrounded by a wall of:
A.	Specialised nucellar cells
B.	Transfer cells
C.	Membrane of megaspore
D.	Membrane of egg
Answer» D. Membrane of egg

Discussion

13080.	The phenomenon of two flowers, one having long stamens and short styles, and other having short stamens and long style:
A.	Allogamy
B.	Heterostyly
C.	Dicliny
D.	Herkogamy
Answer» C. Dicliny

Discussion

13081.	For self pollination, flower must be:
A.	Unisexual
B.	Bisexual
C.	Monosexual
D.	Asexual
Answer» C. Monosexual

Discussion

13082.	Which of the following statement(s) is/are false? (i) Pollen grains represents immatured male gametophyte. (ii) In angiosperms, partially developed male gametophytes are pollinated. (iii) Generative cell is siphonogamous while vegetative cell is spermatogenous. (iv) Formation and differentiation of pollen grains is called microsporogenesis. (v) Pollen grains of some plants produce seve allergy and respiratory or bronchial diseases. (vi) Pollen grains are poor in nutrients.
A.	(i) and (vi)
B.	(iii) and (vi)
C.	(iv) and (v)
D.	(v) and (vi)
Answer» C. (iv) and (v)

Discussion

13083.	Pollen tube is covered by:
A.	Pectocellulose
B.	Sporopollenin
C.	Cellulose
D.	Lignocellulose
Answer» B. Sporopollenin

Discussion

13084.	Tapetum present in the microsporangial wall occurs between:
A.	Epidermis and endothecium
B.	Endothecium and middle layers
C.	Epidermis and middle layers
D.	Middle layers and sporogenous tissue
Answer» E.

Discussion

13085.	Growth of pollen tube is.
A.	Apical
B.	Basal
C.	Intercalary
D.	Diffused
Answer» B. Basal

Discussion

13086.	Number of prothallial cells present in the male gametophyte of angiosperms is:
A.	One
B.	Two
C.	Many
D.	Zero
Answer» E.

Discussion

13087.	Seeds are adaptively important because:
A.	They maintain dormancy.
B.	They protect young plants during vulnerable stages.
C.	They store food for young plants, and facilitate disperal.
D.	All of the above
Answer» E.

Discussion

13088.	In ovule, meiosis occurs in:
A.	Archesporial cell
B.	Megasporocyte
C.	Megaspore
D.	Parietal cell
Answer» C. Megaspore

Discussion

13089.	Which one commonly develops haustoria in embryo sac?
A.	Synergids
B.	Antipodal cells
C.	Oosphere
D.	Central cell
Answer» C. Oosphere

Discussion

13090.	Pea seeds are sown two feet deep in the soil. plants will be:
A.	Formed normally
B.	Not formed
C.	Weaker
D.	Healthier
Answer» C. Weaker

Discussion

13091.	Match column-I with column- II and select the correct answer using the codes given below. Column-I Column-II A. Zoophily I. Pollination by birds B. Ornithophily II. Pollination by insects C. Entomophily III. Pollination by bats D. Chiropterophily IV. Pollination by animals
A.	A-III; B-II; C-I; D-IV
B.	A-I; B-II; C-III; D-IV
C.	A-IV; B-I; C-II; D-III
D.	A-IV; B-II; C-I; D-III
Answer» D. A-IV; B-II; C-I; D-III

Discussion

13092.	The arrangement of floral whorls on the thalamus from the outermost to the innermost is:
A.	Calyx, corolla, androecium and gynoecium
B.	Calyx, corolla, gynoecium and androecium
C.	Gynoecium, androecium, corolla and calyx
D.	Androecium, gynoecium, corolla and calyx
Answer» B. Calyx, corolla, gynoecium and androecium

Discussion

13093.	Angiospermic plant having chromosome number of 12. What will be chromosome number in integuments and nucellus?
A.	4
B.	6
C.	12
D.	24
Answer» D. 24

Discussion

13094.	Female gametophyte of angiosperms is represented by:
A.	Ovule
B.	Megaspore mother cell
C.	Embryo sac
D.	Nucellus
Answer» D. Nucellus

Discussion

13095.	When anthers and stigma mature at the same time it is called [MHCET 2003; AFMC 2005]
A.	Protandry
B.	Homogamy
C.	Isogamy
D.	Dichogamy
Answer» C. Isogamy

Discussion

13096.	Pollen kit is present in
A.	Anemophilous flowers
B.	Entomophilous flowers
C.	Ornithophilous flowers
D.	Hydrophilous flowers
Answer» C. Ornithophilous flowers

Discussion

13097.	The maturation of male (anthers) and female (stigma) structures at different times in the same flower (in order to reduce the possibility of self pollination) is called [Manipal MEE 1995]
A.	Dichogamy
B.	Dichotomy
C.	Dicliny
D.	Dioecy
Answer» B. Dichotomy

Discussion

13098.	The pollination which occurs in one plant is [DPMT 1992]
A.	Herkogamy
B.	Cleistogamy
C.	Dichogamy
D.	Dicliny
Answer» C. Dichogamy

Discussion

13099.	In plants, in nature, autogamy is avoided since the seeds produced [JIPMER 1993]
A.	Are fewer in number
B.	Do not germinate successfully
C.	Do not produce healthy plants
D.	All the above
Answer» E.

Discussion

13100.	Pollination by wind is called [KCET 2001; Manipal 2005]
A.	Geitnogamy
B.	Anemophily
C.	Autogamy
D.	None of the above
Answer» C. Autogamy

Discussion

Explore topic-wise MCQs in NEET.

Which is secreted during allergic reaction?

Which structure of man is similar to spiracle of cockroach?

The inability to absorb digested nutrients may be due to damage of which type of epithelium?

Nerve cells do not possess:

In the given figure of areolar connective tissue, the different cells and parts have been marked by alphabets (1, 2, 3 & 4). Choose the answer in which these alphabets correctly match with the parts and cells they indicate.

Vitamin K is required for:

Which of the following tissue originates exclusively from the ectoderm of the embryo?

In the given diagram name the parts 1, 2, 3, 4 and 5.

In a flowering plant, archesporium gives rise to:

The condition of maturation of stigma before anthers of the same flower is:

3-celled stage of the mature male gametophyte is reached:

In cross self fertilised plants, the flowers are first emasculated. Which organ of the plant is removed in this process?

An angiospermic plant has to produce 88 viable ovules. How many meiotic divisions will be needed to produce equal number of female gametophytes by this plant?

Identify 1, 2, 3, 4 and 5 structures shown in figure of a female gametophyte respectively.

Central cell of embryo sac contains:

As a pollen tube grows into the female organ, the nucleus that enters the synergid first is called the:

The given diagram refers to a T. S. of anther. Identify 1 to 5 respectively.

At the time of anther dehiscence:

The insect pollinated pollen grain, tapetum helps in the development of:

Isogamy is:

Which one of the following element is essential for the growth of pollen tube?

Wall of mature pollen gram consists or:

An example of a naturally occurring parthenocarpic fruit is:

In a seed of maize, scutellum is considered as cotyledon because it:

Hybrid seeds have to be produced every year because:

Cross-pollination is preferred over self pollination because:

Vegetative nucleus occurs in:

Embryo sac is surrounded by a wall of:

The phenomenon of two flowers, one having long stamens and short styles, and other having short stamens and long style:

For self pollination, flower must be:

Pollen tube is covered by:

Tapetum present in the microsporangial wall occurs between:

Growth of pollen tube is.

Number of prothallial cells present in the male gametophyte of angiosperms is:

Seeds are adaptively important because:

In ovule, meiosis occurs in:

Which one commonly develops haustoria in embryo sac?

Pea seeds are sown two feet deep in the soil. plants will be:

Match column-I with column- II and select the correct answer using the codes given below. Column-I Column-II A. Zoophily I. Pollination by birds B. Ornithophily II. Pollination by insects C. Entomophily III. Pollination by bats D. Chiropterophily IV. Pollination by animals

The arrangement of floral whorls on the thalamus from the outermost to the innermost is:

Angiospermic plant having chromosome number of 12. What will be chromosome number in integuments and nucellus?

Female gametophyte of angiosperms is represented by:

When anthers and stigma mature at the same time it is called [MHCET 2003; AFMC 2005]

Pollen kit is present in

The maturation of male (anthers) and female (stigma) structures at different times in the same flower (in order to reduce the possibility of self pollination) is called [Manipal MEE 1995]

The pollination which occurs in one plant is [DPMT 1992]

In plants, in nature, autogamy is avoided since the seeds produced [JIPMER 1993]

Pollination by wind is called [KCET 2001; Manipal 2005]