Gymnosperms MCQs l Plant Kingdom l Class 11 / NEET ug

 

MCQs

1. Assertion (A): Gymnosperms are plants where the ovules are exposed before and after fertilization.

   Reason (R): Gymnosperms do not have an ovary wall to enclose the ovules.

  a) Both A and R are true, and R is the correct explanation of A.

  b) Both A and R are true, but R is not the correct explanation of A.

  c) A is true, but R is false.

  d) A is false, but R is true.

 

2. Assertion (A): In gymnosperms, roots can have specialized structures like mycorrhizae and coralloid roots.

   Reason (R): Mycorrhizae are associated with fungal symbiosis, while coralloid roots are associated with N2-fixing cyanobacteria.

  a) Both A and R are true, and R is the correct explanation of A.

  b) Both A and R are true, but R is not the correct explanation of A.

  c) A is true, but R is false.

  d) A is false, but R is true.

 

3. Assertion (A): Cycas leaves are adapted to withstand extreme environmental conditions.

   Reason (R): Cycas leaves are pinnate and persist for several years.

  a) Both A and R are true, and R is the correct explanation of A.

  b) Both A and R are true, but R is not the correct explanation of A.

  c) A is true, but R is false.

  d) A is false, but R is true.

 

4. Which of the following statements about gymnosperms is incorrect?

  a) Gymnosperms have naked seeds.

  b) Gymnosperms include both medium-sized and tall trees.

  c) Gymnosperms' ovules are enclosed by an ovary wall.

  d) The giant redwood tree is a type of gymnosperm.

 

5. What type of root system is generally found in gymnosperms?

  a) Fibrous roots

  b) Tap roots

  c) Adventitious roots

  d) Prop roots

 

6. In which gymnosperm are coralloid roots found?

  a) Pinus

  b) Cedrus

  c) Cycas

  d) Sequoia

 

7. Which of the following statements is true regarding gymnosperms' leaves?

  a) They are always simple.

  b) They can be simple or compound.

  c) They have no adaptations for extreme conditions.

  d) They lack a thick cuticle.

 

8. The strobili bearing microsporophylls and microsporangia are called:

  a) Macrosporangiate strobili

  b) Female strobili

  c) Microsporangiate strobili

  d) Sporophyll strobili

 

9. What do gymnosperms produce within their sporangia?

  a) Diploid spores

  b) Haploid microspores and megaspores

  c) Only microspores

  d) Only megaspores

 

10. In gymnosperms, the pollen grain is:

   a) A multicellular male gametophyte

   b) A single-cell male gametophyte

   c) A female gametophyte

   d) A structure formed post-fertilization

 

11. How do pollen grains in gymnosperms reach the ovules?

   a) By water currents

   b) By animal carriers

   c) By air currents

   d) By direct contact

 

12. In Cycas, the male and female reproductive structures are:

   a) On the same tree

   b) On different trees

   c) On the same strobilus

   d) Absent

 

Answers:

 1. a) Both A and R are true, and R is the correct explanation of A.

2. a) Both A and R are true, and R is the correct explanation of A.

3. b) Both A and R are true, but R is not the correct explanation of A.

4. c) Gymnosperms' ovules are enclosed by an ovary wall.

5. b) Tap roots

6. c) Cycas

7. b) They can be simple or compound.

8. c) Microsporangiate strobili

9. b) Haploid microspores and megaspores

10. a) A multicellular male gametophyte

11. c) By air currents

12. b) On different trees

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