Question 1

Dimensional formula of a physical quantity is given as MxLyTz. If the dimensional formula of the physical

quantity is the same as that of force, what would be the value of x + y + z?

Options :

A : 0

B : −1

C : −4

D : 1

E :

2

Answer: A

Question 2

Organisms in which type of relationship both benefit from their association?

Options :

A : Mutualism

B :

Parasitism

C : Commensalism

D : Antagonism

E : None of the above

Answer: A

Question 3

In an aquatic environment, oxygen concentration depends on chemical and physical factors and is greatly

affected by many biological processes. These is much less dissolved oxygen (DO) in aquatic environments

than in dry air. In most aquatic environments, there are only 5 to 10 mL of dissolved oxygen in a liter of

water. Chemical and physical factors, such as salinity, pH, and especially temperature, can affect the DO

concentration and distribution. An experiment was done to study the effect of different salinity levels on DO

in water of varying temperatures. The results are below. Salinity is expressed in parts per thousand (ppt)

and is the content of dissolved salt in water.

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The results of the experiment suggest that at salinities of greater than 30 ppt, it is likely that

Options :

A : dissolved oxygen levels would increase

B : water temperature would increase

C :

aquatic organisms would begin to die

D : there would be no change in dissolved oxygen

E :

the amount of dissolved oxygen would decrease

Answer: A

Question 4

The following data is collected from placing three lizards of different species in separate closed tanks to measure their production of carbon dioxide over the course of 30 minutes.

Which of the following conclusions can be accurately drawn from this data?

Options :

A : Lizards with smaller bodies consumed less oxygen per gram of body weight than lizards with larger bodies

B : Each species of lizard has a unique rate of respiration.

C : Lizards in warmer climates produce more carbon dioxide than lizards in colder climates.

D : The 24-gram lizard consumes oxygen at a rate double that of the 12-gram lizard.

E : The amount of carbon dioxide produced per gram of body weight for each species is the same.

Answer: A

Question 5

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Which atom has sp hybridization?

Options :

A : C1

B : C7

C : O1

D : O2

E : None of the above

Answer: A