1. The mechanism of regulation, generally between organism and its environment, of solutes and the gain and the loss of water is called
Homeostasis
Hemostasis
Osmoregulation
Thermoregulation
✅ The correct answer is option C.
Homeostasis MCQs
2. Which of the following statement about Homeostasis is incorrect
There is a definite control system that regulates the homeostatic activities
Homeostatic mechanisms keep the internal environment fixed despite wide changes in the external environment
Because of this, the fluctuations of the internal environment are of extremely narrow range as compared to that of the external environment
All are correct
✅ The correct answer is option B.
3. In a hot summer afternoon, if your body’s Homeostatic machinery keep your internal temperature quite lower than that of external than this is an example of
Positive feedback
Negative feedback
Feedback
Osmoregulation
✅ The correct answer is option B.
4. In osmosis water molecules move from area of _______ to _______ through semipermeable membrane
Higher solute concentration to lower solute concentration
Lower solute concentration to higher solute concentration
Lower solvent concentration to higher solvent concentration
All of these
✅ The correct answer is option B.
5. Which of the following represents osmoregulatory steps taken by hydrophytes?
Increases transpiration by increasing the surface area of the leave.
Small and thick leaves to decrease the surface area proportional to the volume of the leave.
Stomata closing in a sufficient supply, and opening in a restricted supply of water.
None of these
✅ The correct answer is option A.
6. Thick, waxy & leathery cuticle around leaves is present in
Hydrophytes
Mesophytes
Xerophytes
Halophytes
✅ The correct answer is option C.
7. Rose is an example of
Hydrophytes
Mesophytes
Xerophytes
Halophytes
✅ The correct answer is option B.
8. Most of the marine invertebrates are
Osmoconformers
Osmoregulators
Both depend upon the concentration of sea water
None of these
✅ The correct answer is option A.
9. Which of the following fish drink a large amount of seawater and excrete concentrated urine resulting in maximum salt excretion and minimal water loss?
Hagfish
Freshwater Fishes
Bony fishes
None of these
✅ The correct answer is option C.
10. Marine fish can keep their internal environment hypertonic with respect to the surrounding salty water by retaining.
Excessive urea which will increase their internal solute concentration and prevent body shrinkage in a hypertonic environment
Trimethyl alanine
Ammonia
Trimethylamine oxide
✅ The correct answer is option D.