31. Only right aortic arches are present in __
[A] Reptilia
[B] Mammals
[C] Birds
[D] Fishes
Show Answer
Correct Answer: C [Birds]
Notes:
Only right aortic arches are present in Birds. Both left and right arches are found in adult reptiles and amphibians. However, in adult mammals, only the left arch is found while in adult birds only the right aortic arches are found.
32. Which of the following group of mammals, the placenta is absent?
[A] Prototheria
[B] Metatheria
[C] Eutheria
[D] Theria
Show Answer
Correct Answer: A [Prototheria]
Notes:
Prototheria group of mammals in which the placenta is absent. Prototheria is a subclass to which the orders Monotremata.
33. Which is the heaviest organ of the human body?
[A] skin
[B] liver
[C] brain
[D] bone
Show Answer
Correct Answer: A [skin]
Notes:
Skin is the heaviest organ of the human body. Its weight is around 4.5 kg.
34. 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.
35. The least distance of distinct vision for a young adult with normal vision is __
[A] 25 m
[B] 20 m
[C] 25 cm
[D] 20 cm
Show Answer
Correct Answer: C [25 cm]
Notes:
The least distance of distinct vision for a young adult with normal vision is 25 cm.
36. 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.
37. The opening of the infundibulum into the body cavity is called?
[A] isthmus
[B] ampulla
[C] ostium
[D] thalamus
Show Answer
Correct Answer: C [ostium]
Notes:
The opening of the infundibulum into the body cavity is called the ostium.
38. How are Infectious Diseases transmitted?
[A] Droplet Infection
[B] They are inherited
[C] By seeing patients
[D] Eating an unhealthy diet
Show Answer
Correct Answer: A [Droplet Infection]
Notes:
Infection can occur when a healthy person inhales droplets from the saliva, sputum, or nasal passages of an infected person.
39. What is Blood?
[A] Muscular tissue
[B] Epithelial tissue
[C] Reproductive tissue
[D] Connective tissue
Show Answer
Correct Answer: D [Connective tissue]
Notes:
Blood is considered a connective tissue for two basic reasons:
(i) embryologically, it has the same origin (mesodermal) as do the other connective tissue types and
(ii) blood connects the body systems together bringing the needed oxygen, nutrients, hormones and other signaling molecules, and removing the wastes.
40. In which of the following multiple epidermis is found?
[A] Boerhaavia
[B] Nerium
[C] Amaranthus
[D] Helianthus
Show Answer
Correct Answer: B [Nerium]
Notes:
It is assumed that protodermal cells divide periclinally in certain cases to form multiseriate or multiple epidermis. The multiple epidermis is found in some organs like roots of orchids (Vanda), leaves of Ficus, Nerium, Piperomia, etc. In Nerium, it is found on both surfaces.
