Primary Productivity

Q.

Read the given statements and select the correct option
Statement 1: Net primary productivity is less than gross primary productivity
Statement 2: Net primary productivity is equal to gross primary productivity minus the respiratory losses

1. Both statements 1 & 2 are correct
2. Statement 1 is correct but statement 2 is incorrect
3. Statement 1 is incorrect but statement 2 is correct
4. Both statements 1 and 2 are incorrect

Q.

The net primary productivity of an ecosystem is

1. Total weight of green plants-respiratory losses

2. Total weight of green plants+Respiratory losses

3. Respiratory losses alone

4. None of the above

Q.

Productivity is the rate of production of biomass expressed in terms of:

i. $\left(kcal{m}^{–3}\right)y{r}^{–1}$

ii. $g{m}^{–2}y{r}^{–1}$

iii. $g^{–1}y{r}^{–1}$

iv. $kcal{m}^{–2}y{r}^{–1}$

1. ii

2. iii

3. ii and iv

4. i and iii

Q.

Primary productivity is measured in terms of

1. Kg per $m^2$ per yr

2. g per $m^2$ per yr

3. Tonnes per hectare per yr

4. All correct