31. Which one of the following is a cartilaginous fish?
[A] Silver fish
[B] Dog fish
[C] Cray fish
[D] Star fish
Show Answer
Correct Answer: B [Dog fish]
Notes:
Dogfish is a cartilaginous fish. Cartilaginous fishes (Chondrichthyes) represent the oldest surviving jawed vertebrates.
32. The hippocampus (sea horse) belongs to the class?
[A] Agnatha
[B] Chondrichtyes
[C] Osteichthyes
[D] Mammalia
Show Answer
Correct Answer: B [Chondrichtyes]
Notes:
The hippocampus (sea horse) belongs to the class Chondrichthyes. Chondrichthyes are a class of jawed fish with a cartilaginous skeleton.
33. Which of the following were lizard-like reptiles?
[A] Ichthyopterygia
[B] Lepidosauria
[C] Archosauria
[D] Synapsida
Show Answer
Correct Answer: B [Lepidosauria]
Notes:
Lepidosauria were lizard-like reptiles and there were two temporary voids in his skull. Youngina is an example of Lepidosauria.
34. Where do reptiles lay eggs?
[A] in the water
[B] in the mud underwater
[C] on land
[D] in a tree
Show Answer
Correct Answer: C [on land]
Notes:
Reptiles lay eggs on land. Eggs are oval and the eggs are very yolky. Growth is direct.
35. Which of the following layer of skin provides a waterproof barrier and forms our skin tone?
[A] epidermis
[B] dermis
[C] hypodermis
[D] None of these
Show Answer
Correct Answer: A [epidermis]
Notes:
The epidermis is the outermost layer of skin which provides a waterproof barrier and creates our skin tone.
36. Which of the following makes bones so strong?
[A] Silica
[B] Cartilage
[C] Blood and marrow
[D] Calcium and phosphorous
Show Answer
Correct Answer: D [Calcium and phosphorous]
Notes:
Calcium and phosphorus are the minerals that give bones their strength.
37. Consider the following stages of the menstrual cycle:
- Menstruation
- Follicular phase
- Ovulation
- Luteal phase
Which of the following is the correct order of the menstrual cycle stages?
[A] 1, 2, 3, 4
[B] 2, 1, 3, 4
[C] 1, 2, 4, 3
[D] 2, 3, 1, 4
Show Answer
Correct Answer: A [1, 2, 3, 4]
Notes:
The menstrual cycle comprises four stages in a specified order. It begins with Menstruation (shedding of the uterine lining), followed by the Follicular phase (development of follicles in the ovaries), then Ovulation (release of the egg), and finally the Luteal phase (preparation of the uterine lining for potential pregnancy). This order is crucial for the proper functioning and regulation of the menstrual cycle and hormone levels.
38. Which of the following microorganism causes a bacterial disease in a poultry farm?
[A] Ascaridia galli
[B] Mycobacterium avium
[C] Eimeria
[D] Paramyxovirus
Show Answer
Correct Answer: B [Mycobacterium avium]
Notes:
Mycobacterium avium microorganism causes a bacterial disease in a poultry farm.
39. Which of the following is not among Mendel’s laws of inheritance?
[A] Law of Dominance
[B] Law of multiple allele traits
[C] Law of Segregation
[D] Law of Independent Assortment
Show Answer
Correct Answer: B [Law of multiple allele traits]
Notes:
Law of multiple allele traits which are not related to Mendel’s law of inheritance. Law of Dominance, Law of Segregation, and Law of Independent Assortment are related to the law of inheritance.
40. Which vein brings clean blood from the lungs into the heart?
[A] Vena Cava
[B] Pulmonary Vein
[C] Hepatic Vein
[D] Renal Vein
Show Answer
Correct Answer: B [Pulmonary Vein]
Notes:
The pulmonary veins are a set of veins that deliver clean oxygenated blood from the lungs to the heart. It brings oxygen-rich blood to the left atrium. Systemic veins deliver deoxygenated blood to the heart.
