Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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11.

Which of the following is a characteristic feature of gymnosperms?

  • The gymnosperms are homosporous

  • The male and female gametophytes do not have independent free living existence

  • The sporophyte is dependent on the gametophyte

  • The ovules are enclosed by the ovary

  • The ovules are enclosed by the ovary


B.

The male and female gametophytes do not have independent free living existence

The gymnosperms are heterosporous. The male and female gametophytes do not have independent free living existance. Ovules are not enclosed by ovary, in gymnosperms. Pollengrains released from microsporangium. The diploid sporophyte is dominant. 


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12.

Consider the following statements with respect to angiosperms

(A) The male sex organ in a flower is the stamen

(B) The anthers following mitosis produce pollen grains

(C) In an embryosac, the primary endosperm nucleus (PEN) is diploid

(D) After double fertilization the ovules develop into seeds and ovaries develop into fruit.

Of the above statements

  • (C) and (D) are correct

  • (A) and (B) are correct

  • (A) and (C) are correct

  • (A) and (D) are correct

  • (A) and (D) are correct


13.

Select the wrong statement

  • Indigofera is used as a dye

  • Ashwagandha is a medicinal plant

  • Seeds are non-endospermous in Fabaceae

  • Leaves are alternate, simple and exstipulate in Solanaceae

  • Leaves are alternate, simple and exstipulate in Solanaceae


14.

Which of these is an example for a zygomorphic flower with diadelphous stamens and marginal placentation?

  • Pea

  • Lemon

  • Brinjal

  • Cucumber

  • Cucumber


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15.

Match the modification in Column I with the part modified in Column II and choose the right option.

Column I Column II
1. Pneumatophores in Rhizophora A. Axillary buds
2. Tendrils in pea B. Roots
3. Thorns in Citrus C. Leaves

  • 1 - B; 2 - A; 3 - C

  • 1 - C; 2 - A; 3 - B

  • 1 - C; 2 - B; 3 - A

  • 1 - B; 2 - C; 3 - A

  • 1 - B; 2 - C; 3 - A


16.

Select the characters which are not applicable to the anatomy of dicot roots?

(A) Conjunctive tissue present

(B) Presence of protein compounds in the Casparian strips

(C) Polyarch xylem bundles

(D) Presence of pericycle

  • (A) and (B)

  • (B) and (D)

  • (C) and (D)

  • (A) and (D)

  • (A) and (D)


17.

Lenticels are involved in

  • Photosynthesis

  • Food transport

  • Conduction of water

  • Transpiration

  • Transpiration


18.

Match the following.

Column I Column II
A.  Collenchyma 1.  Specialized epidermal cells
B. Subsidiary cells 2. Mechanical support for growing plants
C. Casparian strips 3. Mesophyll tissue of dicot leaf
D. Spongy parenchyma 4. Suberin deposition in the radial walls of endodermis

  • A - 2; B - 1; C - 4; D - 3

  • A - 2; B - 3; C - 4; D - 1

  • A - 1; B - 2; C - 3; D - 4

  • A - 4; B - 1; C - 2; D - 3

  • A - 4; B - 1; C - 2; D - 3


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19.

Pick out the wrong statement

  • Gymnosperms lack vessels in their xylem

  • The cell wall of parenchyma is made up of pectin

  • The first formed primary xylem elements are called protoxylem

  • Gymnosperms have albuminous cells and have sieve
    cells in their phloem

  • Gymnosperms have albuminous cells and have sieve
    cells in their phloem


20.

Which of the following prokaryotic structures has all the below mentioned roles?

i. They help in respiration

ii. They help in cell wall formation

iii. They help in DNA replication

iv. They increase surface area of plasma membrane.

  • Chromosome

  • Ribosome

  • Mesosome

  • Lysosome

  • Lysosome


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