Organisms and Populations

When will the population density increase, under special conditions? When the number of :

1. Deaths exceeds number of births and also number of emigrants equals number of immigrants.
2. Births plus number of immigrants equals number of deaths plus number of emigrants.
3. Births plus number of emigrants is more than the number of deaths plus number of immigrants.
4. Births plus number of immigrants is more than the sum of number of deaths and number of emigrants.

Match List-I with List-II: Choose the correct answer from the options given below:

1. A-III, B-II, C-I, D-IV
2. A-IV, B-I, C-II, D-III
3. A-II, B-III, C-I, D-IV
4. A-II, B-III, C-IV, D-I

Match List-I with List-II. Choose the correct answer from the options given below:

1. A-I, B-IV, C-III, D-II
2. A-IV, B-I, C-II, D-III
3. A-III, B-I, C-II, D-IV
4. A-II, B-IV, C-III, D-I

What do 'a' and 'b' represent in the following population growth curve? [figure]

1. ‘a’ represents exponential growth when resources are not limiting the growth; and ‘b’ represents logistic growth when resources are limiting the growth.
2. ‘a’ represents logistic growth when resources are not limiting the growth; ‘b’ represents exponential growth when resources are limiting the growth.
3. ‘a’ represents carrying capacity and ‘b’ shows logistic growth when resources are limiting the growth.
4. ‘a’ represents exponential growth when resources are not limiting the growth and ‘b’ shows carrying capacity.

Given below are two statements: In the light of the above statements, choose the correct answer from the options given below:

1. Both Statement I and Statement II are false.
2. Statement I is correct but Statement II is false.
3. Statement I is incorrect but Statement II is true.
4. Both Statement I and Statement II are true.

Match List I with List II: Choose the correct answer from the options given below:

1. A-IV, B-I, C-II, D-III
2. A-IV, B-III, C-I, D-II
3. A-III, B-I, C-IV, D-II
4. A-IV, B-II, C-I, D-III

Match List I with List II. Choose the correct answer from the options given below.

1. A-I, B-II, C-IV, D-III
2. A-III, B-IV, C-I, D-II
3. A-II, B-III, C-I, D-IV
4. A-I, B-II, C-III, D-IV

Match List I with List II. Choose the correct answer from the options given below:

1. A-II, B-III, C-I, D-IV
2. A-II, B-IV, C-I, D-III
3. A-II, B-IV, C-III, D-I
4. A-II, B-I, C-III, D-IV

Which one of the following statements cannot be connected to Predation?

1. It helps in maintaining species diversity in a community
2. It might lead to extinction of a species
3. Both the interacting species are negatively impacted
4. It is necessitated by nature to maintain the ecological balance

While explaining interspecific interaction of population, (+) sign is assigned for beneficial interaction, (−) sign is assigned for detrimental interaction and (0) for neutral interaction. Which of the following interactions can be assigned (+) for one species and (−) for another species involved in the interaction?

1. Predation
2. Amensalism
3. Commensalism
4. Competition