11. Which is not a parasite? (UPSC Prelims 1984)
[A] Tick
[B] Housefly
[C] Bed bug
[D] Louse
Show Answer
Correct Answer: B [Housefly]
Notes:
Tick, beg bug and louse are parasitic insects that live on the skin of mammals or birds.
Housefly is not a parasite.
12. Which of the following represent Dinosaurs? (UPSC Prelims 1989)
[A] A reptile
[B] An amphibian
[C] A mammal
[D] A bird
Show Answer
Correct Answer: A [A reptile]
Notes:
Dinosaurs were warm-blooded reptiles. Mammal bone study sheds light on dinosaur physiology.
13. The science of histology is related to which of the following studies?
[A] Tissues
[B] Cells
[C] Algae
[D] Fungi
Show Answer
Correct Answer: A [Tissues]
Notes:
Histology, also known as microscopic anatomy or microanatomy, is the branch of biology that studies the microscopic anatomy of biological tissues.
14. Which of the following was invented by Jonas Salk?
[A] Polio Drop
[B] Polio Vaccine
[C] BCG Vaccine
[D] aspirin
Show Answer
Correct Answer: B [Polio Vaccine]
Notes:
The first effective polio vaccine was developed in 1952 by Jonas Salk. Polio, or poliomyelitis, is a disabling and life-threatening disease caused by the poliovirus.
15. Which of the following is the function of contractile vacuole?
[A] To carry out pinocytosis
[B] To carry out metabolic process
[C] To pump excess water out of the cell
[D] To carry out phagocytosis
Show Answer
Correct Answer: C [To pump excess water out of the cell]
Notes:
Contractile vacuoles that regulate intracellular water balance by storing and expelling excess water from the cell.
16. Which of the following may be most likely to be missing from a gram-positive bacterium?
[A] Penicillin-binding protein
[B] Peptidoglycan
[C] Lipopolysaccharide
[D] Phospholipid bilayer membrane
Show Answer
Correct Answer: C [Lipopolysaccharide]
Notes:
Gram-negative bacteria are surrounded by a thin peptidoglycan cell wall. It itself is surrounded by an outer membrane containing lipopolysaccharides.
17. What is a saprophytic bryophyte?
[A] Buxbaumia aphylla
[B] Ricciocarpus natans
[C] Riccia fluitans
[D] Radula sp
Show Answer
Correct Answer: A [Buxbaumia aphylla]
Notes:
Buxbaumia aphylla is a saprophytic bryophyte and does not produce abundant chlorophyll.
18. Removal of excess water from plants into the atmosphere is called which of the following?
[A] Guttation
[B] Photosynthesis
[C] Transpiration
[D] Storage
Show Answer
Correct Answer: C [Transpiration]
Notes:
Transpiration is the removal of excess water from plants into the atmosphere. This occurs due to the opening of stomata present in the leaves.
19. What is the meaning of abscission among the following?
[A] Dropping of Leaves
[B] Dropping of Fruits
[C] Dropping of Flowers
[D] All of these
Show Answer
Correct Answer: D [All of these]
Notes:
In plants, abscission is the process of discarding old or unwanted organs such as leaves, flowers, floral organs, and fruits.
20. Fusion of female germ nucleus with male germ nucleus is called__?
[A] Adoption
[B] Excretion
[C] Fertilization
[D] Regeneration
Show Answer
Correct Answer: C [Fertilization]
Notes:
Fusion of female germ nucleus with male germ nucleus is called Fertilization.
