MCQ Biology Chapter 3: PLANT KINGDOM, HS 1st year

 

MCQs on Plant Kingdom

1. Which of the following organisms is incorrectly classified as an alga?
   a) Volvox
   b) Spirogyra
   c) Cyanobacteria
   d) Ulothrix
   Answer: c) Cyanobacteria

2. What kind of reproduction is seen in algae where two gametes of different sizes fuse?
   a) Isogamous
   b) Anisogamous
   c) Oogamous
   d) Vegetative
   Answer: b) Anisogamous

3. Which classification system considers evolutionary relationships among organisms?
   a) Artificial
   b) Natural
   c) Phylogenetic
   d) Numerical
   Answer: c) Phylogenetic

4. What is the major pigment in Rhodophyceae (red algae)?
   a) Chlorophyll a
   b) Fucoxanthin
   c) Phycoerythrin
   d) Xanthophyll
   Answer: c) Phycoerythrin

5. Which structure in gymnosperms is equivalent to seeds in angiosperms?
   a) Ovules
   b) Spores
   c) Cones
   d) Strobili
   Answer: a) Ovules

6. What is the stored food material in brown algae?
   a) Starch and pyrenoids
   b) Laminarin and mannitol
   c) Floridean starch
   d) Glycogen
   Answer: b) Laminarin and mannitol

7. Which bryophyte structure provides attachment to the substrate?
   a) Rhizoids
   b) Gemmae
   c) Archegonia
   d) Antheridia
   Answer: a) Rhizoids

8. Which of the following is a feature of liverworts but not mosses?
   a) Presence of rhizoids
   b) Thalloid structure
   c) Sexual reproduction
   d) Gametophyte dominance
   Answer: b) Thalloid structure

9. Which type of plant is the first to possess vascular tissue?
   a) Algae
   b) Bryophytes
   c) Pteridophytes
   d) Gymnosperms
   Answer: c) Pteridophytes

10. What is the term for plants that produce two types of spores, like Selaginella?
    a) Homosporous
    b) Heterosporous
    c) Gametophytic
    d) Sporophytic
    Answer: b) Heterosporous

11. Which of the following algae is used as a food supplement for space travelers due to its protein content?
    a) Chlamydomonas
    b) Volvox
    c) Chlorella
    d) Spirogyra
    Answer: c) Chlorella

12. Which classification method uses cytological information like chromosome number and structure?
    a) Numerical taxonomy
    b) Cytotaxonomy
    c) Chemotaxonomy
    d) Phylogenetic taxonomy
    Answer: b) Cytotaxonomy

13. Which of the following gymnosperms have a fungal association in their roots known as mycorrhiza?
    a) Cycas
    b) Pinus
    c) Ginkgo
    d) Sequoia
    Answer: b) Pinus

14. What is the mode of reproduction in liverworts involving specialized structures called gemmae?
    a) Sexual reproduction
    b) Asexual reproduction
    c) Vegetative reproduction
    d) Spore dispersal
    Answer: b) Asexual reproduction

15. In which type of algae is the food stored in the form of floridean starch?
    a) Chlorophyceae
    b) Phaeophyceae
    c) Rhodophyceae
    d) Cyanobacteria
    Answer: c) Rhodophyceae

16. Which stage in the moss life cycle is filamentous and develops directly from a spore?
    a) Gametophyte
    b) Sporophyte
    c) Protonema
    d) Archegonium
    Answer: c) Protonema

17. Which type of reproduction is common in brown algae and involves biflagellate zoospores?
    a) Vegetative
    b) Asexual
    c) Sexual isogamous
    d) Sexual oogamous
    Answer: b) Asexual

18. Which algae produce hydrocolloids like algin and carrageen used commercially?
    a) Green and red algae
    b) Red and brown algae
    c) Brown and green algae
    d) Cyanobacteria and red algae
    Answer: b) Red and brown algae

19. Which of the following is NOT a feature of bryophytes?
    a) They lack true roots, stems, and leaves.
    b) They are dependent on water for sexual reproduction.
    c) The sporophyte is the dominant stage of their lifecycle.
    d) They are called amphibians of the plant kingdom.
    Answer: c) The sporophyte is the dominant stage of their lifecycle.

20. What is the main characteristic that differentiates gymnosperms from angiosperms?
    a) Presence of vascular tissue
    b) Production of seeds
    c) Naked ovules
    d) Alternation of generations
    Answer: c) Naked ovules