31. Which part of the human brain is known as the thalamus?
[A] The main part
[B] The back part
[C] The relay station
[D] The small part
Show Answer
Correct Answer: C [The relay station]
Notes:
The thalamus in the human brain serves as an important relay station. It is large, two-lobed organ that resides in the midbrain. The thalamus’ primary role is to transfer motor and sensory signals to the cerebral cortex. Most sensory information (expect olfaction) goes through the thalamus before being routed to the cortex. It also regulates sleep and alertness.
32. A membrane, or sac, that surrounds your heart is called a __.
[A] pericardium
[B] capillaries
[C] vessels
[D] None of these
Show Answer
Correct Answer: A [pericardium]
Notes:
A membrane, or sac, that surrounds your heart is called the pericardium. It holds the heart in place and helps it to function properly.
33. Which of the following disease is transmitted by animal bite and saliva?
[A] Rabies
[B] Tuberculosis
[C] Tetanus
[D] AIDS
Show Answer
Correct Answer: A [Rabies]
Notes:
Rabies disease is transmitted by animal bites and saliva.
34. Tetanus is caused by which of the following causative agent?
[A] Vibrio cholerae
[B] Corynebacterium diptheriae
[C] Treponema pallidum
[D] Clostridium tetani
Show Answer
Correct Answer: D [Clostridium tetani]
Notes:
Tetanus is caused by Clostridium tetani bacteria. This is a serious disease of the nervous system.
35. The biofertilizer present in the roots of legumes is __
[A] Anabaena
[B] Rhizobium
[C] Azospirillum
[D] All of the above
Show Answer
Correct Answer: B [Rhizobium]
Notes:
Rhizobium leguminocerium bacteria live symbiotically in the root nodules of legumes and some non-legumes. They fix atmospheric N2 and hence increase soil fertility.
36. Which of the following is divalent cations are usually used to make competent cells?
[A] Carbon
[B] Nitrogen
[C] Copper
[D] Calcium
Show Answer
Correct Answer: D [Calcium]
Notes:
Calcium is divalent cations that are usually used to make competent cells.
37. Jellyfish are an example of which type of phylum?
[A] Phylum -Protozoa
[B] Phylum -Porifera
[C] Phylum – Cnidaria
[D] Phylum -Ctenophora
Show Answer
Correct Answer: C [Phylum – Cnidaria]
Notes:
Cnidarian, also called coelenterate, any member of the phylum Cnidaria (Coelenterata), a group made up of more than 9,000 living species. ? Mostly marine animals, the cnidarians include the corals, hydras, jellyfish, Portuguese men-of-war, sea anemones, sea pens, sea whips, and sea fans.
38. Clitellum is found in ____:
[A] Leech
[B] Snail
[C] Nereis
[D] Earthworm
Show Answer
Correct Answer: D [Earthworm]
Notes:
The clitellum is a thickened glandular and non-segmented section of the body wall near the head in earthworms and leeches, that secretes a viscid sac in which the eggs are deposited. Its main function is to store the eggs of the earthworm.
39. Columba livia is the scientific name of _____:
[A] Pigeon
[B] Shark
[C] Snake
[D] Rabbit
Show Answer
Correct Answer: A [Pigeon]
Notes:
The Rock Dove (Columba livia) or Rock Pigeon, is a member of the bird family Columbidae (doves and pigeons). In common usage, this bird is often simply referred to as the “pigeon”. The species includes the domestic pigeon (including the fancy white pigeon).
40. Which type of plants have weak stems and take support on neighbouring structures to climb up?
[A] Climbers
[B] Herbs
[C] Trees
[D] Shrubs
Show Answer
Correct Answer: B [Herbs]
Notes:
There are some plants with weak stems that cannot stand upright and spread on the ground. These are called creepers, while those that take support on neighbouring structures and climb up are called climbers. Money plant, gourd plant, etc are examples of climbers.
