31. Photoreceptors in the eye called rods are important for __
[A] Night vision and central vision
[B] Colour vision and peripheral vision
[C] Night vision and peripheral vision
[D] Colour vision and central vision
Show Answer
Correct Answer: C [Night vision and peripheral vision]
Notes:
Photoreceptors in the eye called rods are important for Night vision and peripheral vision. There are about 120 million photoreceptors in our eyes called rods. These are important for scotopic vision or monochromatic vision in low light.
32. The human alimentary canal runs from the mouth to the anus and is approximately how many meters long?
[A] 4 m
[B] 15 m
[C] 9 m
[D] 1 m
Show Answer
Correct Answer: C [9 m]
Notes:
The human alimentary canal runs from the mouth to the anus and is approximately 9 meters long.
33. Which of the following is not pure endocrine gland?
[A] Thyroid gland
[B] Thymus gland
[C] Pancreas
[D] Adrenal
Show Answer
Correct Answer: C [Pancreas]
Notes:
The pancreas and gonads are two glands that are not pure endocrine. The pancreas secretes both hormones and enzymes and acts as both endocrine and exocrine.
34. A hormone, which is released by the posterior pituitary:
[A] Oxytocin
[B] TSH
[C] ICSH
[D] Prolactin
Show Answer
Correct Answer: A [Oxytocin]
Notes:
A hormone, which is released by the posterior pituitary is Oxytocin. The posterior pituitary does not synthesize hormones, but it is able to store and release the two hormones.
35. Which of the following is the place of development of the embryo?
[A] Uterus
[B] Fallopian tubes
[C] A pair of ovaries
[D] Vagina
Show Answer
Correct Answer: A [Uterus]
Notes:
The uterus is the place of development of the embryo. This is a hollow muscular organ located in the female pelvis between the bladder and rectum.
36. A condition in which one or both of the testes fail to descend from the abdomen into the scrotum called __
[A] Vasectomy
[B] Phimosis
[C] Cryptorchidism
[D] None of these
Show Answer
Correct Answer: C [Cryptorchidism]
Notes:
A condition in which one or both of the testes fail to descend from the abdomen into the scrotum is called Cryptorchidism.
37. The population of the vagina with semen during coitus is called __.
[A] Insemination
[B] Outsemination
[C] Copulation
[D] Fertilization
Show Answer
Correct Answer: A [Insemination]
Notes:
Sperm along with other contents of semen populate the vagina. This process is called conception or Insemination.
38. What is the causative agent of chickenpox?
[A] Rubella
[B] Yersinia pestis
[C] Varicella-zoster virus
[D] None of these
Show Answer
Correct Answer: C [Varicella-zoster virus]
Notes:
Chickenpox is caused by the varicella-zoster virus, a member of the herpesvirus family. The disease is highly contagious and is known for its classic symptom of itchy, blister-like rash on the skin. Apart from chickenpox, the varicella-zoster virus also causes shingles, a disease that can occur later in life in those who have had chickenpox.
39. Which of the following is the best fertilizer for paddy?
[A] Azolla pinnata
[B] Bacillus megatherium
[C] Rhizobium meliloti
[D] Bacillus polymyxa
Show Answer
Correct Answer: A [Azolla pinnata]
Notes:
Azolla pinnata is the best fertilizer for paddy. Azolla pinata is a species of fern that is known by several common names, including mosquito fern, winged mosquito fern, and water velvet.
40. What is Bt cotton?
[A] cloned plant
[B] transgenic plant
[C] hybrid plant
[D] mutated plant
Show Answer
Correct Answer: B [transgenic plant]
Notes:
Bt cotton is a transgenic plant. Plants in which one or more genes of another species have been introduced into the genome using genetic engineering procedures are called transgenic plants.
