Biology Class 11th Chapter 3 mcqs

1. Which of the following is used to grow microbes?

(a) Laminaria

(b) Gelidium

(c) Chlorella

(d) Sargassum

Answer: (b) Gelidium

2. Isogamous condition with non-flagellated gametes is found in

(a) Chlamydomonas

(b) Spirogyra

(c) Volvox

(d) Fucus

Answer: (b) Spirogyra

3. Gymnosperms produce neither flower nor fruit because they do not possess

(a) Embryo

(b) Ovary

(c) Ovule

(d) Seed

Answer: (b) Ovary

4. Rhodophyceae is called red algae because of the pigment

(a) Fucoxanthin

(b) Phycoerythrin

(c) Carotenoids

(d) Chlorophyll

Answer: (b) Phycoerythrin

5. In moss stomata appears on

(a) Capsule

(b) Leaves

(c) Stem

(d) All of these

Answer: (a) Capsule

6. The gametophyte is not an independent, free-living generation in

(a) Pinus

(b) Polytrichum

(c) Adiantum

(d) Marchantia

Answer: (a) Pinus

7. In gymnosperms, the development of pollen grains occurs in

(a) Strobili

(b) Microsporangia

(c) Megasporangia

(d) Macrosporangia

Answer: (b) Microsporangia

8. Ribbon shaped chloroplasts occur in

(a) Ulothrix

(b) Spirogyra

(c) Chlamydomonas

(d) Riccia

Answer: (b) Spirogyra

9. Antheridia and Archegonia are sex organs of

(a) Moss

(b) Mucor

(c) Spirogyra

(d) Puccinia

Answer: (a) Moss

10. Iodine is found in

(a) Spirogyra

(b) Laminaria

(c) Polysiphonia

(d) Chlorella

Answer: (b) Laminaria

11. Bryophytes are called amphibians of plant kingdom because

(a) These plants live in soil and depend on marine organisms for asexual reproduction.

(b) These plants live in soil and depend on water for sexual reproduction.

(c) These plants live in water and depend on land animals for sexual reproduction.

(d) These plants live near water bodies.

Answer: (b) These plants live in soil and depend on water for sexual reproduction.

12. Which one of the following is a vascular cryptogram?

(a) Cedrus

(b) Equisetum

(c) Ginkgo

(d) Marchantia

Answer: (b) Equisetum

13. Pinus differs from mango in having

(a) Tree habit

(b) Green leaves

(c) Ovules not enclosed in ovary

(d) Wood

Answer: (c) Ovules not enclosed in ovary

14. Which of the followings plant material is an efficient water imbibant?

(a) Agar

(b) Cellulose

(c) Lignin

(d) Pectin

Answer: (a) Agar

15. In a monoecious plant

(a) Male and female sex organs are on the same individual

(b) Male and female gametes are of two morphologically distinct types

(c) Male and female sex organs are on different individuals

(d) All the stamens are fused to form one unit

Answer: (a) Male and female sex organs are on the same individual

16. The seedless vascular plants whose sporophytes are larger than their small and independent gametophytes are

(a) Pteridophytes

(b) Angiosperms

(c) Gymnosperms

(d) None of these

Answer: (a) Pteridophytes

17. Which of the following is a liverwort?

(a) Sphagnum

(b) Funaria

(c) Marchantia

(d) Polytrichum

Answer: (c) Marchantia

18. Transgenic plants are the ones

(a) Grown in artificial medium after hybridization in the field

(b) Produced by a somatic embryo in artificial medium

(c) Generated by introducing foreign DNA in to a cell and regenerating a plant from that cell

(d) Produced after protoplast fusion in artificial medium

Answer: (c) Generated by introducing foreign DNA in to a cell and regenerating a plant from that cell

19. Which of the following plants is used extensively for the study of photosynthesis?

(a) Amaranthus

(b) Asparagus

(c) Chlorella

(d) Sunflower

Answer: (c) Chlorella