Here is important Biology Class 12th important Solved MCQs Chapter 1 Homeostasis. Student get excellent Grades in Board Matric exam after preparation Online Biology Quiz. Biology Multiple Choice Questions.
Multiple Choice Questions 2nd Year
MCQs Biology F.Sc. Part 2
Chapter No.15 Homeostasis
Best MCQs for Entry Test MDCAT, ECAT & Pakistan Medical Commission
Total MCQs = 50
51. The entry of water from salty soil into roots of halophytes takes place because the root of halophytes develop:
(A) High water potential
B) Low osmotic pressure
(C) Low water potential
(D) All of these
Answer:
(C) Low water potential
52. Animals that do not adjust their internal osmoregularity and are isotonic with their environment are:
(A) Osmoconformcrs
(B) Osmoregulators
(C) Thermoregulators
(D) Thermoconfermors
Answer:
(A) Osmoconformcrs
53. Animals that are not isotonic with their environment and have developed mechanisms to regulate their internal solute and water concentrations are:
(A) Osmoconformers
(B) Osmoregrulators
(C) Thermoregualtors
(D) Both (A) and (B)
Answer:
(B) Osmoregrulators
55. An increase in blood sugar level triggers the release of the hormone insulin b the pancreas, the hormone insulin lowers blood sugar level restoring the body to its original blood glucose level by converting glucose to glycogen.
This is an example of:
(A) Positive feed back
(B) Negative feed back
(C) Homeostatic imbalance
(D) None of these
Answer:
(B) Negative feed back
