NEET Biology Morphology of Flowering Plants MCQs Set 12

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Chapter-wise Objective Questions: Morphology Of Flowering Plants

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Multiple Choice Questions

Question 1: Leaves are lateral, generally flattened structure born on nodes. They originate from .............. and arranged in ............ manner
(a) Apical meristem, Acropetal
(b) Lateral meristem, Acropetal
(c) Apical meristem, Basipetal
(d) Lateral meristem, Basipetal
Show Answer & Explanation

Answer: (a) Apical meristem, Acropetal

Explanation:
1. Leaves originate from the shoot apical meristem and are arranged in acropetal order.

Teacher's Note:
1. Family characters are tested through floral formula, inflorescence and economic plants.
2. Liliaceae: perianth and colchicine; Fabaceae: papilionaceous corolla and diadelphous stamens; Solanaceae: swollen placenta; Brassicaceae: tetradynamous stamens.

Question 2: About leaf which of the following statement is not correct ?
(a) Axillary buds are present in axil of leaflets
(b) In pinnately compound leaf leaflets are present on rachis, which represents the midrib
(c) In palmately compound leaf, leaflets are attached at a common point, it is tip of the petiole
(d) In compound leaf incisions of lamina reach upto the mid rib, breaking it into number of leaflets
Show Answer & Explanation

Answer: (a) Axillary buds are present in axil of leaflets

Explanation:
1. Axillary buds lie in the axil of the petiole of a leaf, not in the axils of leaflets.

Teacher's Note:
1. Learn the vegetative modifications by their description: runner, stolon, sucker and offset differ in the place of origin and direction of growth.
2. For flowers, remember the position of ovary (hypogynous, perigynous, epigynous), aestivation types and placentation types with one example each.

Question 3: When two leaves arise from same node, this type of phyllotaxy called
(a) Alternate
(b) Opposite
(c) Whorled
(d) Spiral
Show Answer & Explanation

Answer: (b) Opposite

Explanation:
1. Two leaves at one node make opposite phyllotaxy.

Teacher's Note:
1. Learn the vegetative modifications by their description: runner, stolon, sucker and offset differ in the place of origin and direction of growth.
2. For flowers, remember the position of ovary (hypogynous, perigynous, epigynous), aestivation types and placentation types with one example each.

Question 4: Arrangement of flowers on the floral axis is termed as inflorescence. Regarding to inflorescence which of the following statement is not correct
(a) In racemose – main axis is continues to grow
(b) In cymose – main axis terminates into flower
(c) In racemose – flowers are in basipetal succession
(d) In cymose –growth of main axis is limited
Show Answer & Explanation

Answer: (c) In racemose – flowers are in basipetal succession

Explanation:
1. In racemose inflorescence flowers open in acropetal succession, so basipetal is wrong.

Teacher's Note:
1. Family characters are tested through floral formula, inflorescence and economic plants.
2. Liliaceae: perianth and colchicine; Fabaceae: papilionaceous corolla and diadelphous stamens; Solanaceae: swollen placenta; Brassicaceae: tetradynamous stamens.

Question 5: Regarding to symmetry of flower which of the following plant is odd
(a) Pea
(b) Mustard
(c) Datura
(d) Chilli
Show Answer & Explanation

Answer: (a) Pea

Explanation:
1. Pea has a zygomorphic flower; mustard, datura and chilli are actinomorphic.

Teacher's Note:
1. Learn the vegetative modifications by their description: runner, stolon, sucker and offset differ in the place of origin and direction of growth.
2. For flowers, remember the position of ovary (hypogynous, perigynous, epigynous), aestivation types and placentation types with one example each.

Question 6: Find out the wrong match
(a) Actinomorphic – Datura
(b) Radial symmetry – Mustard
(c) Zygomorphic – Bean
(d) Bilateral Symmetry – Chilli
Show Answer & Explanation

Answer: (d) Bilateral Symmetry – Chilli

Explanation:
1. Chilli is actinomorphic (radial symmetry), so the bilateral pair is wrong.

Teacher's Note:
1. Family characters are tested through floral formula, inflorescence and economic plants.
2. Liliaceae: perianth and colchicine; Fabaceae: papilionaceous corolla and diadelphous stamens; Solanaceae: swollen placenta; Brassicaceae: tetradynamous stamens.

Question 7: In which of the following plant flower can not be divided into two similar halves by any vertical plane
(a) Mustard
(b) Cassia
(c) Canna
(d) Datura
Show Answer & Explanation

Answer: (c) Canna

Explanation:
1. Canna flowers are asymmetric and cannot be divided into equal halves by any vertical plane.

Teacher's Note:
1. Learn the vegetative modifications by their description: runner, stolon, sucker and offset differ in the place of origin and direction of growth.
2. For flowers, remember the position of ovary (hypogynous, perigynous, epigynous), aestivation types and placentation types with one example each.

Question 8: In which of the following plant gynoecium occupies the highest position while the other parts situated below it ?
(a) Brinjal
(b) Plum
(c) Rose
(d) Guava
Show Answer & Explanation

Answer: (a) Brinjal

Explanation:
1. Brinjal has a hypogynous flower in which the gynoecium occupies the highest position.

Teacher's Note:
1. Family characters are tested through floral formula, inflorescence and economic plants.
2. Liliaceae: perianth and colchicine; Fabaceae: papilionaceous corolla and diadelphous stamens; Solanaceae: swollen placenta; Brassicaceae: tetradynamous stamens.

Question 9: Match the following and select correct option :- (a) Hypogynous (i) Lily, Onion (b) Perigynous (ii) Cucumber, Ray florets of sunflower (c) Epigynous (iii) Plum, Peach (d) Perianth (iv) Chinarose, Brinjal
(a) a(iv), b(iii), c(ii), d(i)
(b) a(iv), b(ii), c(iii), d(i)
(c) a(iii), b(ii), c(iv), d(i)
(d) a(iii), b(iv), c(ii), d(i)
Show Answer & Explanation

Answer: (a) a(iv), b(iii), c(ii), d(i)

Explanation:
1. Hypogynous is China rose and brinjal, perigynous plum and peach, epigynous cucumber and sunflower ray florets, and perianth lily.

Teacher's Note:
1. Learn the vegetative modifications by their description: runner, stolon, sucker and offset differ in the place of origin and direction of growth.
2. For flowers, remember the position of ovary (hypogynous, perigynous, epigynous), aestivation types and placentation types with one example each.

Question 10: Calyx is the outermost accessory whorl of flower. What is the function of calyx?
(a) Helps in pollination
(b) Helps in protection of flower during bud condition
(c) Helps in fertilization
(d) Helps in seed germination
Show Answer & Explanation

Answer: (b) Helps in protection of flower during bud condition

Explanation:
1. The calyx protects the flower in the bud stage.

Teacher's Note:
1. Family characters are tested through floral formula, inflorescence and economic plants.
2. Liliaceae: perianth and colchicine; Fabaceae: papilionaceous corolla and diadelphous stamens; Solanaceae: swollen placenta; Brassicaceae: tetradynamous stamens.

Question 11: The mode of arrangent of sepals or petals in floral buds with respect to other members of the same whorl is known as
(a) Adhesion
(b) Cohesion
(c) Aestivation
(d) Plancentation
Show Answer & Explanation

Answer: (c) Aestivation

Explanation:
1. Arrangement of sepals or petals in the bud is aestivation.

Teacher's Note:
1. Learn the vegetative modifications by their description: runner, stolon, sucker and offset differ in the place of origin and direction of growth.
2. For flowers, remember the position of ovary (hypogynous, perigynous, epigynous), aestivation types and placentation types with one example each.

Question 12: Match the following with respect to aestivation in petals and select correct option :- (a) Valvate (i) Chinarose (b) Twisted (ii) Calotropis (c) Imbricate (iii) Pea (d) Vexillary (iv) Cassia
(a) a(ii), b(i), c(iv), d(iii)
(b) a(ii), b(iii), c(iv), d(i)
(c) a(i), b(ii), c(iii), d(iv)
(d) a(iv), b(iii), c(ii), d(i)
Show Answer & Explanation

Answer: (a) a(ii), b(i), c(iv), d(iii)

Explanation:
1. Valvate is Calotropis, twisted China rose, imbricate Cassia and vexillary pea.

Teacher's Note:
1. Family characters are tested through floral formula, inflorescence and economic plants.
2. Liliaceae: perianth and colchicine; Fabaceae: papilionaceous corolla and diadelphous stamens; Solanaceae: swollen placenta; Brassicaceae: tetradynamous stamens.

Question 13: Which type of aestivation is found in petals of cotton?
(a) Valvate
(b) Twisted
(c) Imbricate
(d) Vexillary
Show Answer & Explanation

Answer: (b) Twisted

Explanation:
1. Cotton petals show twisted aestivation.

Teacher's Note:
1. Learn the vegetative modifications by their description: runner, stolon, sucker and offset differ in the place of origin and direction of growth.
2. For flowers, remember the position of ovary (hypogynous, perigynous, epigynous), aestivation types and placentation types with one example each.

Question 14: Match the following (a) Epiphyllous stamen (i) Citrus (b) Monoadelphous stamen (ii) Pea (c) Diadelphous stamen (iii) Chinarose (d) Polyadelphous stamen (iv) Lily
(a) a(ii), b(i), c(iii), d(iv)
(b) a(i), b(ii), c(iii), d(iv)
(c) a(iv), b(iii), c(i), d(ii)
(d) a(iv), b(iii), c(ii), d(i)
Show Answer & Explanation

Answer: (d) a(iv), b(iii), c(ii), d(i)

Explanation:
1. Epiphyllous stamens are in lily, monoadelphous in China rose, diadelphous in pea and polyadelphous in citrus.

Teacher's Note:
1. Family characters are tested through floral formula, inflorescence and economic plants.
2. Liliaceae: perianth and colchicine; Fabaceae: papilionaceous corolla and diadelphous stamens; Solanaceae: swollen placenta; Brassicaceae: tetradynamous stamens.

Question 15: Variation in length of the filament of stamen with in flower can be seen in
(a) Salvia
(b) Mustard
(c) Chinarose
(d) Both 1 & 2
Show Answer & Explanation

Answer: (d) Both 1 & 2

Explanation:
1. Salvia and mustard show variation in filament length (didynamous, tetradynamous).

Teacher's Note:
1. Learn the vegetative modifications by their description: runner, stolon, sucker and offset differ in the place of origin and direction of growth.
2. For flowers, remember the position of ovary (hypogynous, perigynous, epigynous), aestivation types and placentation types with one example each.

Question 16: Match the following and select correct option :- (a) Parietal (i) Dianthus (b) Axile (ii) Sunflower (c) Free central (iii) Mustard (d) Basal (iv) China rose
(a) a(iii), b(iv), c(ii), d(i)
(b) a(iii), b(iv), c(i), d(ii)
(c) a(i), b(ii), c(iii), d(iv)
(d) a(i), b(ii), c(iv), d(iii)
Show Answer & Explanation

Answer: (b) a(iii), b(iv), c(i), d(ii)

Explanation:
1. Parietal is mustard, axile China rose, free central Dianthus and basal sunflower.

Teacher's Note:
1. Family characters are tested through floral formula, inflorescence and economic plants.
2. Liliaceae: perianth and colchicine; Fabaceae: papilionaceous corolla and diadelphous stamens; Solanaceae: swollen placenta; Brassicaceae: tetradynamous stamens.

Question 17: In which type of placentation, ovules are present on central axis
(a) Axile
(b) Parietal
(c) Free central
(d) Both 1 & 3
Show Answer & Explanation

Answer: (d) Both 1 & 3

Explanation:
1. Ovules lie on the central axis in axile and free central placentation.

Teacher's Note:
1. Learn the vegetative modifications by their description: runner, stolon, sucker and offset differ in the place of origin and direction of growth.
2. For flowers, remember the position of ovary (hypogynous, perigynous, epigynous), aestivation types and placentation types with one example each.

Question 18: A dot on the top of the floral diagram shows
(a) Adhesion
(b) Aestivation
(c) Mother axis
(d) Position of ovary
Show Answer & Explanation

Answer: (c) Mother axis

Explanation:
1. The dot above the floral diagram represents the mother axis.

Teacher's Note:
1. Family characters are tested through floral formula, inflorescence and economic plants.
2. Liliaceae: perianth and colchicine; Fabaceae: papilionaceous corolla and diadelphous stamens; Solanaceae: swollen placenta; Brassicaceae: tetradynamous stamens.

Question 19: Colchicine a mitotic poison can be obtained from a plant of
(a) Brassicaceae
(b) Fabaceae
(c) Solanaceae
(d) Liliaceae
Show Answer & Explanation

Answer: (d) Liliaceae

Explanation:
1. Colchicine is obtained from Colchicum, a member of Liliaceae.

Teacher's Note:
1. Learn the vegetative modifications by their description: runner, stolon, sucker and offset differ in the place of origin and direction of growth.
2. For flowers, remember the position of ovary (hypogynous, perigynous, epigynous), aestivation types and placentation types with one example each.

Question 20: Match the following and select correct option (a) Mustard (i) Liliaceae (b) Mulaithi (ii) Solanaceae (c) Ashwagandha (iii) Fabaceae (d) Tulip (iv) Brassicaceae
(a) a(iv), b(iii), c(ii), d(i)
(b) a(iv), b(iii), c(i), d(ii)
(c) a(iii), b(iv), c(ii), d(i)
(d) a(i), b(ii), c(iii), d(iv)
Show Answer & Explanation

Answer: (a) a(iv), b(iii), c(ii), d(i)

Explanation:
1. Mustard is Brassicaceae, mulaithi Fabaceae, ashwagandha Solanaceae and tulip Liliaceae.

Teacher's Note:
1. Learn the vegetative modifications by their description: runner, stolon, sucker and offset differ in the place of origin and direction of growth.
2. For flowers, remember the position of ovary (hypogynous, perigynous, epigynous), aestivation types and placentation types with one example each.

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