Organisms and Populations · Question 4

Consider a population of 10 million cells. Given the per-capita birth rate of 0.002 (per unit time) and the per-capita death rate of 0.002 (per unit time), the expected number of cells after 10 generations is .

1. 100 million
2. 1 million
3. 5 million
4. 10 million

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). In the light of the above statements, choose the most appropriate answer from the options given below:

1. A is not correct but R is correct
2. Both A and R are correct and R is the correct explanation of A
3. Both A and R are correct but R is not the correct explanation of A
4. A is correct but R is not correct

Match List-I with List-II.

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

Epiphytes that are growing on a mango branch are an example of which of the following?

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

Who is known as the father of Ecology in India?

1. Ram Udar
2. Birbal Sahni
3. S.R. Kashyap
4. Ramdeo Misra

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

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

Which one of the following equations represents the Verhulst-Pearl Logistic Growth of population?

1. dNdt = rN ( N-KN )
2. dNdt = N ( r-KK )
3. dNdt = r ( K-NK )
4. dNdt = rN ( K-NK )

The equation of Verhulst-Pearl logistic growth is dNdt = rN [ K-NK ]. From this equation, K indicates:

1. Intrinsic rate of natural increase
2. Biotic potential
3. Carrying capacity
4. Population density

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

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.