Question

Blood osmotalibes and the adaptable ranges of environmental salinities of two types of animals are shown in the graph below Mark the correct descriptions of these artma:
A.Type I maintain more or less stable internal osmolality by physiological means
B.Type II animals maintain blood osmolality within narrow physiological ranges under different salinity conditions.
C. Type I animals are not likely to be found in estuaries or river mouths where fresh and salt water meet and the salinity fluctuates greatly.
D.Type II animals gain and lose water at equal rates and have no need to expend enemy exoellind water or salt from the body.

• A. A and B
• B. B and C
• C. C and D
• D. Aand D

Answer 1

The correct option is D Aand D

• The blood osmolarity of organism A remains same in contrast to the changing saline concenteration. Hence, it is a regulator.
  
• The blood osmolarity of organism B changes as soon as the saline concenteration cahnges, making it a Conformer.
  
• Type I can regulate it's homeostasis, hence can ve found at the junction of fresh and saline water bodies.
• Type I organism do not invest energy to maintain homeostasis as it is a conformer.

So, the correct option is 'A and D'.