Osmoconformers

Q.

If a marine fish is placed in a freshwater aquarium, will the fish to able to survive? Why or why not?

Q. Select the option that correctly fills the blanks (A –D).

For freshwater fish, the osmolarity of the surrounding water is ___A___ than the osmolarity of its body fluids, hence fish is said to be ___B____ to the surrounding freshwater. The reason for this being that the fish absorbs ions via ____C___ to maintain its body function.

This leads to endosmosis and to tackle the problem of excess incoming water, the fish excretes ____D_____urine.

1. A – less, B – hypertonic, C – lungs, D – dilute
2. A – less, B – hypertonic, C – gills, D – dilute
3. A – less, B – hypotonic, C - lungs, D – concentrated
4. A – less, B – hypotonic, C – gills, D – dilute

Q.

If a marine fish is placed in a fresh water aquarium, will the fish be able to survive? Why or why not?

Q. The sponges are

1. Mostly marine and a few freshwater forms.
2. Mostly freshwater and a few marine forms.
3. Both marine and freshwater forms.
4. Mostly marine and a few are terrestrial and freshwater forms.

Q.

Which of the following pairs are correctly matched?

(A) Poikilosmotic – Animals show osmotic changes with respect to the environment.

(B) Homoiosmotic – Animals maintain body fluid concentrations constant irrespective of fluctuations in the
environmental concentrations.

(C) Euryhaline – Animals withstand aquatic media of wide range of salt concentrations.

(D) Stenohaline – Animals survive with a wide range of salinities

1. B, C, D

2. B & C

3. A, C, D

4. A, B, C

Q. 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.

1. A and B
2. B and C
3. C and D
4. Aand D

Q. What is the rate of flow of water in sponges??

Q.

Which of the following pairs are correctly matched?

(A) Poikilosmotic – Animals show osmotic changes with respect to the environment.

(B) Homoiosmotic – Animals maintain body fluid concentrations constant irrespective of fluctuations in the
environmental concentrations.

(C) Euryhaline – Animals withstand aquatic media of wide range of salt concentrations.

(D) Stenohaline – Animals survive with a wide range of salinities

1. B, C, D

2. B & C

3. A, C, D

4. A, B, C

Q. A marine bony fish continuously

1. Acquire water and get rid of salt
2. Get rid of both water and salt
3. Acquire both water and salt
4. Get rid of water and acquire salt

Q.

Which one of the followig is a conformer with respect to homeostasis and how?

Tiger, Dog, Shark, Whale

Q.

What changes will occur in Fresh Water Fish if kept in Marine water ?

Q.

If a marine fish is placed in a fresh water aquarium, will the fish be able to survive? Why or why not?