31. Excretion in flatworms is done by__
[A] protonephridia
[B] flame cells
[C] green glands
[D] malpighian tubules
Show Answer
Correct Answer: B [flame cells]
Notes:
Excretion in flatworms is done by flame cells. A flame cell is a specialized emitting cell. It is found in most simple freshwater invertebrates, including flatworms, rotifers, and nemertians.
32. Cuttlefish is a member of which of the following?
[A] Mollusca
[B] Echinodermata
[C] Pisces
[D] Amphibia
Show Answer
Correct Answer: A [Mollusca]
Notes:
Cuttlefish is a member of Mollusca. They belong to the class Cephalopoda, which also includes squid, octopus and nautilus.
33. Which of the following is rat-fish?
[A] Salmons
[B] Lamprey
[C] Sharks
[D] Chimeras
Show Answer
Correct Answer: D [Chimeras]
Notes:
Chimeras are cartilaginous fish in the order Chimaeriformes. They are known informally as ghost sharks, ratfish, spookfish, or rabbitfish.
34. How many systematic arteries are there in reptiles?
[A] 1
[B] 2
[C] 3
[D] 4
Show Answer
Correct Answer: B [2]
Notes:
There are 2 systematic arteries in reptiles. Most reptiles have three-chambered hearts with two atria and one common ventricle.
35. The order Cetacea includes which of the following group?
[A] Monkey, gorilla, and man
[B] Cat, dog, wolf, and lion
[C] Whale, dolphin, and porpoise
[D] Hippopotamus, pig and giraffe
Show Answer
Correct Answer: C [Whale, dolphin, and porpoise]
Notes:
Cetaceans are aquatic mammals that constitute the infra-order Cetacea, including whales, dolphins, and porpoises.
36. How is leather obtained from animals?
[A] Fracking
[B] Stunning
[C] Tanning
[D] All of these
Show Answer
Correct Answer: C [Tanning]
Notes:
Tanning is the process of treating animal hides and hides for the production of leather.
37. Which of the following helps in clotting and clotting of blood?
[A] Lymphocytes
[B] Monocytes
[C] Thrombocytes
[D] Granulocytes
Show Answer
Correct Answer: C [Thrombocytes]
Notes:
Thrombocytes help in clotting and clotting of blood. Thrombocytes are specialized blood cells produced from the bone marrow.
38. Urine that contains glucose is usually an indicator of:
[A] Diabetes
[B] Bacterial infection
[C] Kidney stones
[D] Muscle atrophy
Show Answer
Correct Answer: A [Diabetes]
Notes:
Urine that contains glucose is usually an indicator of Diabetes. Diabetes is a disease in which the blood sugar level is too high. Insulin is a hormone that helps glucose get into cells and gives them energy.
39. What is the enzyme that breaks down lactose?
[A] Lipase enzymes
[B] Pepsin
[C] Amylase
[D] Lactase
Show Answer
Correct Answer: D [Lactase]
Notes:
Lactase is the enzyme that breaks down lactose.
40. What is the function of Sertoli cells in the male reproductive system?
[A] help in the erection of the penis
[B] secrete male sex hormones
[C] carrier of man’s genes
[D] provide nutrition to germ cells
Show Answer
Correct Answer: D [provide nutrition to germ cells]
Notes:
Providing nutrition to germ cells is the function of Sertoli cells in the male reproductive system.
