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4

In flower (X), the gynoecium occupies the highest position while the other parts are situated below it. The ovary in such flowers is said to be Y. Identify X and Y and select the correct option.

A. X - Epigynous, Y - Inferior

B. X - Perigynous, Y - Superior

C. X - Hypogynous, Y - Superior

D. X - Perigynous, Y - Half-inferior

Correct Answer :

C. X - Hypogynous, Y - Superior


Hypogynous flowers (Superior ovary): In this, the ovary occupies the highest position on the thalamus while other floral parts are situated below it. In such flowers, the ovary is superior. E.g., China rose, mustard etc. Perigynous flowers (Half inferior ovary): In this, the ovary is situated at the centre and other floral parts are arranged on the rim of the thalamus. The ovary here is said to be half inferior. E.g., plum, rose, peach. Epigynous flowers (Inferior ovary): In this, the thalamus grows around the ovary fusing with its wall. The other floral parts are present above the ovary. Hence, the ovary is said to be inferior. E.g., flowers of guava and cucumber.

Related Questions

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4

Match the following stem modifications given in column I with their examples given in column II and select the correct combination from the options given below.
(Stem Modifications)(Found in)
A. Underground stemI. Euphorbia
B. Stem tendrilII. Opuntia
C. Stem thornsIII. Potato
D. Flattened stemIV. Citrus
E. Fleshy cylindrical stemV. Cucumber

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

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

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

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

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4

Which of the following plants is growing in swampy areas, where many roots come out of the ground and grow vertically upwards?

A. Potato

B. Opuntia

C. Rhizophora

D. Grass

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4

Which one of the following statement is not correct?

A. Each stamen which represents the male reproductive organ consists of a stalk or a filament and an anther.

B. An actinomorphic flower can be dissected into two equal halves from any plane.

C. Superior ovary is found in hypogynous flowers.

D. When stamens are attached to the petals, they are epiphyllous as in brinjal.

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4

Which of the following is a modified stem for the protection of plants from browsing animals?

A. Tendrils

B. Thorns

C. Rhizome

D. Tuber

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4

Fibrous root system is found in

A. monocotyledonous plants.

B. dicotyledonous plants.

C. bryophytes.

D. gymnosperms.

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4

In which of the following plants, a slender lateral branch arises from the base of the main axis and after growing aerially arch downwards to touch the ground?

A. Mint and jasmine

B. Banana and pineapple

C. Grass and stawberry

D. Pistia and Eichhornia

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4

When a flower can be divided into two equal radial halves in any radial plane passing through the centre, it is known as

A. actinomorphic

B. zygomorphic

C. asymmetric

D. bisymmetric

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4

Identify the correct families of the given plant species (A, B and C) 
q14

A. A - Liliaceae, B - Compositae, C - Malvaceae

B. A - Fabaceae, B - Solanaceae, C - Liliaceae

C. A - Compositae, B - Malvaceae, C - Liliaceae

D. A - Solanaceae, B - Fabaceae, C - Liliaceae

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4

Which is not a stem modification ?

A. Rhizome of ginger

B. Corm of Colocasia

C. Pitcher of Nepenthes

D. Tuber of potato

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4

The region of the root-tip which is involved in the formation of root hairs by epidermal cells is called the

A. region of maturation.

B. region of meristematic activity.

C. region of elongation.

D. none of the above.

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4

When a flower has both androecium and gynoecium, it is known as__________.

A. asexual

B. bisexual

C. unisexual

D. multisexual

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4

How many plants in the list given below have marginal placentation?
  1. Mustard
  2. Gram
  3. Tulip
  4. Asparagus
  5. Arhar
  6. Sunhemp
  7. Chilli
  8. Colchicine
  9. Onion
  10. Moong
  11. Pea
  12. Tobacco
  13. Lupin

A. Four

B. Five

C. Six

D. Three

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4

Which of the following statement(s) is/are correct about the fruit?
  1. Fruit is a mature or ripened ovary, developed before fertilization.
  2. It consists of a wall or pericarp and seeds.
  3. When pericarp is thick and fleshy, it is differentiated into outer mesocarp, middle epicarp and the inner endocarp.
  4. In mango and coconut, the fruit is known as a berry.

A. Only (i)

B. Both (ii) and (iii)

C. Only (ii)

D. All of these

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4

The part of the root which is most active in water absorption is called

A. root cap

B. maturation zone

C. meristematic zone

D. zone of elongation

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4

Which one of the following statement is correct?

A. Bulb of Allium cepa is a modified stem.

B. Cloves of Allium sativum are fleshy scale leaves.

C. Corm of Colocasia is a modified root.

D. Tendril in Vitis vinifera is a modified axillary bud.

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4

The region of the stem where leaves are born are called ____________ while ____________ are the portions between two ____________.

A. nodes, nodes and internodes

B. nodes, internodes and nodes

C. internodes, nodes and nodes

D. internodes, internodes and nodes

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4

Cotyledons and testa respectively are edible parts in which of the following group?

A. walnut and tamarind

B. cashew nut and litchi

C. french bean and coconut

D. groundnut and pomegranate

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4

The main function(s) of root system is/are

A. absorption of water and minerals from the soil

B. storing reserve food material

C. synthesis of plant growth regulators

D. All of the above

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4

Which of the following statement(s) is/are correct about venation?
(i) The arrangement of veins and the veinlets in the lamina of leaf is called venation.
(ii) Reticulate venation is the characteristic of monocots.
(iii) When the veinlets form a network, the venation is termed as reticulate venation.
(iv) When the veins run parallel to each other, within a lamina, the venation is termed as parallel venation.

A. Only (i)

B. Both (i) and (ii)

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

D. All of these

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4

The given figures (A and B) shows the modificaiton of roots.Which of the following statements regarding the figures is correct ? 
q3

A. Tap roots of carrot, turnip and adventitious root of sweet potato, get swollen and store food.

B. Pneumatophores conducts water, minerals & photosynthesis

C. Pneumatophore is found in the plants that grow in sandy soil.

D. Turnip & carrot shows adventitious roots and sweet potato shows tap root.

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4

A scar on the seed coat through which the developing seeds attached to the fruit is called as ________.

A. testa

B. tegmen

C. hilum

D. micropyle

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4

The given figure shows a typical structure of monocotyledonous seeds. Identify A, B, C, D and E parts marked in the given figures. 
q13

A. A - Endosperm, B - Embryo, C - Scutellum, D - Coleorhiza, E - Coleoptile

B. A- Embryo, B - Endosperm, C - Scutellum, D - Coleoptile, E - Coleorhiza

C. A - Endosperm, B - Embryo, C - Scutellum, D - Coleoptile, E - Coleorhiza

D. A - Embryo, B - Endosperm, C - Scutellum, D - Coleorhiza, E - Coleoptile

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4

It is a proteinous layer and the outer covering of endosperm which separates the embryo. Identify the layer.

A. Tegmen

B. Scutellum

C. Hyaline layer

D. Aleurone layer

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4

Which of the following statement (s) is/are not correct?
  1. Calyx and corolla are reproductive organs of a flower.
  2. Zygomorphic flower can be divided into two equal radial halves in any radial plane.
  3. Flowers without bracts are termed as bracteate.
  4. Parthenocarpic fruit is formed after fertilization of the ovary.
  5. In legumes, seed is non-endospermic.
  6. Radical buds develop on roots.

A. (i) , (ii), (iii) and (iv)

B. (i), (ii) and (v)

C. (iii), (iv) and (vi)

D. (iv), (v) and (i)

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4

Study the following statements and select the correct option
  1. Buds are present in axil of leaflets of the compound leaf.
  2. Pulvinus leaf-base is present in some leguminous plants.
  3. In Alstonia, the petioles expand, become green and synthesize food.
  4. Opposite phyllotaxy is seen in guava.

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

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

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

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

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4

Match the column-I containing types of aestivation with their examples given in column-II and choose the correct option.
Column - IColumn-II
(Type of aestivation)(Examples)
A. ValvateI. Cotton
B. TwistedII. Calotropis
C. ImbricateIII. Bean
D. VexillaryIV. Gulmohar

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

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

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

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

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4

Identify the inflorescence shown by the given figures A and B. 
q5

A. A-Cymose, B-Racemose

B. A-Racemose, B-Cymose

C. A-Racemose, B-Racemose

D. A-Cymose, B-Cymose

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4

Leaves of dicotyledonous plants possess _________ venation, while _________ venation is the characteristic of most monocotyledons.

A. reticulate and parallel

B. parallel and reticulate

C. reticulate and perpendicular

D. obliquely and parallel

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4

The root differs from stem in having

A. nodes and internodes

B. axillary buds

C. multicellular hairs

D. unicellular hairs

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4

Which one of the following option shows the correct labelling of the structure marked as A, B, C & D? 
q10

A. A - Gynoecium, B - Megasporophyll, C - Ovule, D - Thalamus

B. A - Gynoecium, B - Stamen, C - Seed, D - Thalamus

C. A - Microsporophyll, B - Stamen, C - Ovule, D - Thalamus

D. A - Gynoecium, B - Stamen, C - Ovule, D - Thalamus