11. What is a common feature of archaebacteria?
[A] Structure of cell membrane
[B] Structure of cell wall
[C] Has fatty acid synthetase
[D] Structure of flagellin protein
Show Answer
Correct Answer: C [Has fatty acid synthetase]
Notes:
Archaebacteria are primitive bacteria that have a cell wall consisting of branched lipids that help them to endure adverse conditions.
12. Which of the following is a sexual spore?
[A] Ascospore
[B] Sporangiospore
[C] Conidia
[D] Zoospore
Show Answer
Correct Answer: A [Ascospore]
Notes:
The ascospore is a spore contained in an ascus; this type of spore is typical of fungi classified as ascomycetes.
13. Which of the following organelles is absent in animal cells and present in plant cells?
[A] Cytoplasm
[B] Cell wall
[C] Vacuoles
[D] Mitochondria
Show Answer
Correct Answer: B [Cell wall]
Notes:
The cell wall surrounds the plasma membrane of plant cells. The cell wall is a fairly rigid layer that surrounds a cell located outside the plasma membrane.
14. Bacteria come under which type of organisms?
[A] Single-celled
[B] Microscopic
[C] Living
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Bacteria are single-celled microorganisms that do not have a nucleus and other cell organelles. They are classified as prokaryotic organisms.
15. Which plant tissue consists of phloem and xylem?
[A] Complex Permanent Tissue
[B] Simple Permanent Tissue
[C] Parenchyma Tissue
[D] Collenchyma Tissue
Show Answer
Correct Answer: A [Complex Permanent Tissue]
Notes:
Complex Permanent Tissue tissues include phloem and xylem. Xylem helps in the transport of water and soluble components.
Phloem helps in the transportation of food particles.
16. Plants are the only organisms that can prepare food for themselves by using which of the following substances?
[A] water
[B] carbon dioxide
[C] minerals
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Plants are the only organisms that can prepare food for themselves by using water, carbon dioxide and minerals. The raw materials are present in their surroundings.
17. Which of the following is not a characteristic of insectivorous plants?
[A] the plants that trap insects
[B] derive nutrition from dead and decaying plants and animals
[C] Their leaves are modified into special structures which traps the insects and digest
[D] These plants grow on the soil that lacks minerals
Show Answer
Correct Answer: B [derive nutrition from dead and decaying plants and animals]
Notes:
Insectivorous plants are plants that trap insects. Their leaves are modified into special structures that trap insects and are digested with the help of digestive enzymes to obtain nutrition from those insects. These plants grow on soil that lacks minerals.
18. By which gas do commercial fruit growers control the ripening time of fruits?
[A] Ethane
[B] Argon
[C] Benzene
[D] Ethylene
Show Answer
Correct Answer: D [Ethylene]
Notes:
Ethylene gas is used by commercial fruit growers to control the ripening time of the fruit.
19. Who is the father of plant pathology in India?
[A] Heinrich Anton de Bary
[B] E.F. Smith
[C] Edwin John Butler
[D] Robert Harting
Show Answer
Correct Answer: C [Edwin John Butler]
Notes:
Edwin John Butler is the father of plant pathology in India. He was an Irish mycologist and plant pathologist.
20. Which one of the following is a limbless lizard?
[A] Hemidactylus
[B] Chamelion
[C] Anguis
[D] Phrynosoma
Show Answer
Correct Answer: C [Anguis]
Notes:
Anguis is a limbless or legless lizard in the family Anguidae. They are also called slowworms or blindworms.
