11. To which of the following kingdoms does the yeast belong to?
[A] Bacteria
[B] Virus
[C] Fungus
[D] None of the above.
Show Answer
Correct Answer: C [Fungus]
Notes:
Yeast is an unicellular eukaryotic micro organism belonging to the family of fungus.
12. Exobiology refers to the study of which of the following?
[A] Organism
[B] Endodermis
[C] Life in the air
[D] Life on the other planets
Show Answer
Correct Answer: D [Life on the other planets]
Notes:
Exobiology is the study of the origin, evolution and distribution of life in the context of cosmic evolution.
13. What is another name for cyanobacteria?
[A] Blue-green algae
[B] Protists
[C] Golden algae
[D] Slime moulds
Show Answer
Correct Answer: A [Blue-green algae]
Notes:
Cyanobacteria, also called blue-green algae, are microscopic organisms found naturally in all types of water.
14. Viruses reproduce in living cells by__?
[A] replication
[B] duplication
[C] multiplication
[D] all of these
Show Answer
Correct Answer: A [replication]
Notes:
DNA replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules.
15. Which of the following is a group of plants that has the largest ovule, the largest gamete and the largest tree?
[A] Angiosperms
[B] Gymnosperms
[C] Pteridophytes
[D] Bryophytes
Show Answer
Correct Answer: B [Gymnosperms]
Notes:
A group of plants that has the largest ovule, the largest gamete and the largest tree is Gymnosperms.
16. Which of the following is a characteristic of angiosperms?
[A] Seed-bearing plants
[B] Seeds are enclosed within fruits
[C] Both 1 & 2
[D] Neither 1 nor 2
Show Answer
Correct Answer: C [Both 1 & 2]
Notes:
Characteristics of angiosperms: Seed plants, seeds are sealed inside the fruit, presence of well differentiated plant body, produce flowers during their lifetime, presence of two subtypes – monocotyledonous and dicotyledonous
17. What does the ‘Perfect stage’ of a fungus indicate?
[A] indicates that it can reproduce asexually
[B] indicates that it is perfectly healthy
[C] indicates that it is able to form perfect sexual spores
[D] All of the above
Show Answer
Correct Answer: C [indicates that it is able to form perfect sexual spores]
Notes:
The ‘Perfect stage’ of a fungus indicates that it is able to form perfect sexual spores.
18. Which of the following is not a characteristic of gymnosperms?
[A] Parallel venation
[B] Perennial plants
[C] Distinct branches
[D] Xylem with vessels
Show Answer
Correct Answer: D [Xylem with vessels]
Notes:
The characteristics of gymnosperms: They do not produce flowers, Seeds are not formed inside a fruit, they are found in colder regions where snowfall occurs, they develop needle-like leaves, they are perennial or woody, forming trees or bushes, they are not differentiated into the ovary, style, and stigma.
19. Pollination where the transfer of pollen between anthers and stigmas of different flowers of the same plant or different plants of the same species is called__.
[A] Self-Pollination
[B] Cross-Pollination
[C] Fertilization
[D] Adoption
Show Answer
Correct Answer: B [Cross-Pollination]
Notes:
Pollination where the transfer of pollen between anthers and stigmas of different flowers of the same plant or different plants of the same species is called Cross-Pollination.
20. Which plant material is called an embryo?
[A] Seed
[B] Fruit
[C] Flower
[D] Root
Show Answer
Correct Answer: A [Seed]
Notes:
The seed contains plant material, it can develop into another plant. This plant material is called the embryo.
