Question

1. The surface tension of which liquid is higher than any other common liquid?

A. Carbon monoxide

B. Water

C. Syrup

D. Chlorine

2.  Dorsal, Caudal, anal, and adipose fins all fall into a category of a certain type of fin. What is the name for that category of fin?

A.               Paired fins

B.               Median fins

C.              Pectoral fins

D.              Pelvic fins

Answer 1

1.

Ans:

Surface tension:

Surface tension is the energy required to increase the surface area of the liquid. In other word force by which length of liquid surface tends to increase. The surface tension is about intermolecular forces between molecules of liquid (i.e. H2O molecule in water). It has been found that since H2O molecules are bounded by H-bods the force mentioned above is more and hence the surface tension is more as compared to rest of the chemicals mentioned.

If we look at the property of carbon monoxide and chlorine both are gases, hence intermolecular forces will be weak and hence low surface tension compared to water and the same logic goes with that of syrup.

Hence the answer to this question is Water

Option B

2.

Ans:

The fins used in fish are important mainly for locomotion. The types of fins mentioned in question such as Dorsal, Caudal, anal and adipose fins belong to the median type of fins. These fins help fish for the generation of locomotor force that helps during steady swimming or moving ahead skillfully. These are also called as unpaired median fins

Hence the correct answer for this question is;

Option B

median fins of fishes consist of the dorsal, anal, and caudal fins and have long been thought to play an important role in generating locomotor force during both steady swimming and maneuvering.