31. Which of the following is a characteristic of a bird?
[A] warm blooded vertebrates
[B] four-chambered heart
[C] Both 1 and 2
[D] None of these
Show Answer
Correct Answer: C [Both 1 and 2]
Notes:
Birds are warm-blooded vertebrates and have four-chambered hearts like human beings and forelimbs modified into feathery wings.
32. The soundbox of birds is also known as __
[A] synsacrum
[B] syrinx
[C] larynx
[D] None of the above
Show Answer
Correct Answer: B [syrinx]
Notes:
The melodious sound of many birds comes from a mysterious organ buried deep within their chests. Such a voice box is called the syrinx.
33. The sweat glands in mammals are primarily concerned with:
[A] Regulation of water content
[B] Regulation of body heat
[C] The killing of skin bacteria
[D] Removal of excess salt
Show Answer
Correct Answer: B [Regulation of body heat]
Notes:
The sweat glands in mammals are primarily concerned with the regulation of body heat. When the internal temperature rises, the eccrine glands secrete water to the surface of the skin, where the heat is removed by evaporation.
34. Which layer has the highest concentration of keratin and lamellar granules?
[A] Stratum Basale
[B] Stratum Spinosum
[C] Stratum Corneum
[D] Stratum Granulosum
Show Answer
Correct Answer: C [Stratum Corneum]
Notes:
The Stratum Corneum layer has the highest concentration of keratin and lamellar granules. Stratum Corneumlayer contains 25-30 layers of dead flattened keratinocytes
35. The brainstem consists of which of the following
[A] Tectum and Tegmentum
[B] Hypothalamus and Thalamus
[C] Medulla and Pons
[D] None of the above
Show Answer
Correct Answer: A [Tectum and Tegmentum]
Notes:
The brainstem consists of Tectum and Tegmentum. The midbrain tegmentum is the part of the midbrain that extends from the substantia nigra to the cerebral aqueduct. The tectum is the dorsal side of the midbrain.
36. How is the image formed on the retina of the human eye?
[A] virtual and inverted
[B] real and inverted
[C] real and erect
[D] virtual and erect
Show Answer
Correct Answer: B [real and inverted]
Notes:
Eye lens is of convex nature. Therefore, the image formed by it on the retina is real and inverted.
37. Haematuria is a disorder involving __
[A] Loss of haemoglobin in R.B.C.
[B] The loss of blood through the urine
[C] The increase in concentration blood urea
[D] Loss of glucose in urine
Show Answer
Correct Answer: B [The loss of blood through the urine]
Notes:
Haematuria is a disorder involving the loss of blood through the urine.
38. Which is the largest endocrine gland of the body?
[A] Thymus gland
[B] Pineal gland
[C] Thyroid gland
[D] Adrenal gland
Show Answer
Correct Answer: C [Thyroid gland]
Notes:
The thyroid gland is the largest endocrine gland in the body. These glands are found in front of the neck. It is found at the bottom of the throat, in the middle of the trachea.
39. Which gland stimulates the adrenal gland to secrete cortisol?
[A] Pituitary gland
[B] Thyroid gland
[C] Parathyroid glands
[D] Adrenal glands
Show Answer
Correct Answer: A [Pituitary gland]
Notes:
The pituitary gland stimulates the adrenal gland to secrete cortisol. Cortisol is a steroid hormone.
40. Panthera pardus is the scientific name of ____:
[A] Panther
[B] Leopard
[C] Lion
[D] Tiger
Show Answer
Correct Answer: B [Leopard]
Notes:
Panthera pardus is the scientific name of leopard, one of the five “big cats” in the genus Panthera. It is a member of the family Felidae with a wide range in sub-Saharan Africa and parts of Asia. It belongs to the Chordata phylum, Mammalia class and Carnivora order.
