31. Myopia may occur because __
[A] the eyeball is too short from front to back
[B] the eyeball is elongated from front to back
[C] the muscles that control the lens may lose power as people grow older
[D] None of these
Show Answer
Correct Answer: B [the eyeball is elongated from front to back]
Notes:
Myopia may occur because the eyeball is elongated from front to back. Myopia or nearsightedness occurs when the light coming into the eye is not directly on the retina but in front of it.
32. One of two large chambers on the lower side of the heart that collect and expel blood towards the peripheral beds within the body and lungs:
[A] Capillaries
[B] Atria
[C] Ventricles
[D] Valves
Show Answer
Correct Answer: C [Ventricles]
Notes:
A ventricle is one of two large chambers on the underside of the heart that collect and eject blood toward the peripheral beds within the body and lungs.
33. What does the liver do to help digestion?
[A] Makes important enzymes
[B] Neutralizes stomach acid
[C] Produces bile
[D] Regulates insulin
Show Answer
Correct Answer: C [Produces bile]
Notes:
The liver makes a digestive juice called bile that helps digest fats and certain vitamins.
34. Mycorrhiza is a symbiotic association between
[A] Bacteria and fungi
[B] Algae and fungi
[C] Fungi and roots of higher plants
[D] Blue green algae and roots of higher plants
Show Answer
Correct Answer: C [Fungi and roots of higher plants]
Notes:
Mycorrhiza is a symbiotic association between fungi and roots of higher plants. A non-disease-producing association in which the fungus invades the root to absorb nutrients is called Mycorrhiza.
35. Green Revolution related to which of the following?
[A] Milk
[B] Agriculture
[C] Water
[D] Animals
Show Answer
Correct Answer: B [Agriculture]
Notes:
Green Revolution related to Agriculture. It took place between 1950-1960 and focused mainly on increasing agricultural production and started in Mexico.
36. Wilting of plants occurs due to excessive ____:
[A] Respiration
[B] Glutation
[C] Absorption
[D] Transpiration
Show Answer
Correct Answer: D [Transpiration]
Notes:
Plant wilting occurs after excessive loss of water by transpiration and lesser absorption. i.e. rate of transpiration exceeds rate of water absorption. On a hot day, plants transpire heavily and cannot absorb water speedily to keep pace with transpiration loss, even when there is enough water.
37. Which mosquito is the carrier of Zika virus?
[A] Culex
[B] Aedes
[C] Anopheles
[D] Culiseta
Show Answer
Correct Answer: B [Aedes]
Notes:
Zika virus (ZIKV) is a member of the virus family Flaviviridae. It is spread by daytime-active Aedes mosquitoes, such as A. aegypti and A. albopictus. Its name comes from the Zika Forest of Uganda, where the virus was first isolated in 1947. Zika virus is related to the dengue, yellow fever, Japanese encephalitis, and West Nile viruses.
38. Lungs of a plant are
____:
[A] Roots
[B] Flowers
[C] Stems
[D] Leaves
Show Answer
Correct Answer: D [Leaves]
Notes:
Leaves are the lungs of plants. Much like the lungs of animals, leaves are the place of a plant’s respiration. It is from leaves that oxygen is emitted during the light hours of the day and carbonic acid gas diffuse in during day and released out at night through stomata.
39. What is a Sponge?
[A] A fungus
[B] A fossil
[C] A plant
[D] An animal
Show Answer
Correct Answer: D [An animal]
Notes:
Sponges are sedantric, diploblastic, asymmetrical animals, once considered plants. They are characterized by the water canal system with pores called the ostia and osculum. They are also known to posses the multipurpose cells called chanocytes.
40. Which part of the brain plays an important role in motor control?
[A] Pons
[B] Medulla
[C] Cerebrum
[D] Cerebellum
Show Answer
Correct Answer: D [Cerebellum]
Notes:
The cerebellum, also known as little brain, is a region of the brain that plays an important role in balance and motor control. It is also involved in some cognitive functions such as attention, language, emotional functions (such as regulating fear and pleasure responses) and in the processing of procedural memories.
