Alternation Of Generation MCQs And Answers (Multiple Choice Questions)

These Alternation of Generation MCQs and Answers are most important for your upcoming biology examinations. With the Alternation of Generations exam just around the corner, it’s time to start brushing up on what seems to be a lot of new information. What better way to review than with a few MCQs! These Alternation of Generation MCQs and Answers will help you get an edge on your competition, no matter if you’re starting biology fresh or if you’ve been out of class for a while.

Alternation of Generation MCQs and Answers

1. Which of the following is incorrect about the haplontic life cycle?

Gametophytes are the dominant phase in this life cycle

Sporophytes are free-living

Spores are haploid in nature and form gametophytes by mitotic division

Zygote acts as sporophyte

2. Which of the following life cycle suits Chlamydomonas?

Haplontic

Diplontic

Triplontic

Haplo-diplontic

3. Which among the following is incorrect about the diplontic life cycle?

The sporophyte is the dominant phase

All spermatophytes exhibit diplontic life cycle

Gametophyte depends on the sporophyte

Sporophyte depends on Gametophyte for their food

4. Which among the following life cycle is exhibited by a rose plant?

Haplontic

Diplontic

Triplontic

Haplo-diplontic

5. Which among the following is incorrect about the Haplo-diplontic life cycle?

In this life cycle, both the sporophytic phase and gametophytic phase have an equal lifetime

Both sporophytic and gametophytic phases are multi-cellular and have an independent existence

This kind of life cycle is exhibited by Pteridophytes and Bryophyte

Ectocarpus exhibits haplo-diplontic life cycle

6. Which of the following life cycle is exhibited by Fucus?

Diplontic

Haplontic

Triplolntic

Haplo-diplontic

7. Which among the following life cycle is exhibited by Polysiphonia?

Diplontic

Haplontic

Triplolntic

Haplo-diplontic

8. Which among the following is incorrect?

In bryophytes, haploid gametophyte is the dominant phase

In Volvox, the haploid gametophyte is the dominant phase

In Spirogyra, diploid Sporophyte is the dominant phase

In Papaya, the haploid gametophyte is the dominant phase

9. Which one has the larges gametophyte?

Cycas

Angiosperm

Selaginella

Moss

10. Which of the following is a diploid?

Capsule of moss

Gametophyte. archegonia and egg of moss

Gametophyte, antheridia and sperm of moss

Gametophyte and spore of moss

11. In moss, antheridia and archegonia occur at the tips of two different branches of the same plant.The condition is called

Monoecious and autoecious

Monoecious and paroicous

Monoecious and synoicous

Dioecious

12. Read the given statements and select the correct option.
Statement 1 : Bryophytes show alternation of generation.
Statement 2 : A haploid gametophytic generation and a diploid sporophytic generation alternate in the life cycle.

Both statements 1 and 2 are correct.

Statement 1 is correct but statement 2 is incorrect.

Statement 1 is incorrect but statement 2 is correct.

Both statements 1 and 2 are incorrect.

13. Gametophyte self incompatibility does not differ from saprophytic self incompatibility in that.

There is co-dominance of self incompatibility alleles

Both give 50% functional. Pollen in pollinations on some other plants

There is breakdown of incompatibility on induction of polyploidy

There is complete failure of seed set on self pollination

14. Aposporously formed gametophytes in Dryopetris will bear gametes that are ____________.

Haploid

Diploid

Triploid

Tetraploid

15. Which one of the following is not a common feature of gametophyte selfincompatibility systems?

Pollen is 3-celled

Pistil is wet

Rejection reaction occurs in the style

In vitro germination of pollen is easy

16. Production of gametes in Bryophytes involve.

Meiosis

Mitosis

fertilization

Reduction division

17. Haploids are considered better genetic stock because they ______________

Require only half of the nutrients

Are best for cytological studies

Grow better under all conditions

Form homozygous individuals on depolarization

18. What are chromosome number in the following respectively (i) Synergid of Gossypium (ii) Leaf cells in Allium (iii) Endosperm of Saccharum.

48,16,36

52,26,32

26,16,120

48,96,24

19. Consider the following four statements whether they are correct or wrong
(A)The sporophyte in liverworts is more elaborate than that in mosses
(B)Salvinia is heterosporous
(C)The Life-cycle in all seed-bearing plants is diplontic
(D) In Pinus male and female cones are borne on different trees
The two wrong statements together are

Statements (A) and (C)

Statements(A) and (D)

Statements(B) and (C)

Statements (A) and (B)

20. Opening of floral buds into flowers, is a type of:

Autonomic movement of growth

Autonomic movement of locomotion

Autonomic movement of variation

Paratonic movement of growth

21. The term prothallus is used for

Stage before thallus

Plant body without differentiation of stem, leaves and roots

Reduced gametophyte

Reduced sporophyte

22. Choose the correct statement:

bryophytes can live in soil but are dependent on water for sexual reproduction

sex organ in bryophytes are unicellular

Main plant bodies in bryophytes are gametophytes, differentiated into true root, stem, and leaves\

Common examples of liverworts are Polytrichum

23. Zygote does not undergo immediate reduction division in all, except :

Gymnosperms

Pteridophytes

Bryophytes

Angiosperms

24. The gametophyte is always dioecious in

All pteridophytes

Gymnosperms only

Angiosperms

All spermatophytes

25. Arange the following division in the correct sequence of the progressive evolution in their haploid phase (Gametophyte)
I) Thallophyta
II) Bryophyta
III) Pteridophyta
IV) Spermatophta

IV, III, I, II

IV, III, II, I

IV, II, III, I

II, I, III, IV

Alternation of Generation MCQs and Answers

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