1
(01.04 MC)

Which of the following is true of photosynthesis but not of cellular respiration? (3 points)

Photosynthesis releases oxygen gas as a product.

Photosynthesis occurs in all organisms.

Photosynthesis requires glucose as a reactant.

Photosynthesis is a process in which glucose is broken down.
2.
(01.04 MC)

Which of the following describes the calculation for net primary productivity? (3 points)

Subtracting macronutrients from micronutrients

Adding primary and secondary productivity

Subtracting cellular respiration from gross primary productivity

Multiplying gross primary productivity by cellular respiration
3.
(01.04 LC)

Ecosystems that have a high primary productivity can convert solar energy to biomass rapidly. (3 points)

False

True

1. Photosynthesis is the process by which autotrophic organisms synthesize their food in form of sugars in the presence of sunlight. Photosynthetic process combines carbon dioxide (CO2) and water (H2O) to form glucose (C6H12O6) and oxygen gas as products. The equation is as follows:

6CO2 + 6H2O → C6H12O6 + 6O2

2. Net primary productivity, denoted by NPP, refers to the amount of biomass present in an ecosystem. It can be calculated by subtracting the amount of CO2 lost via cellular respiration from the amount produced called Gross primary productivity (GPP). That is;

NPP = GPP - cellular respiration

3. The process by which organic matter is synthesized from inorganic ones by organisms called AUTOTROPHS or PRIMARY PRODUCERS is called PRIMARY PRODUCTIVITY. Examples of autotrophic organisms are green plants, algae etc. Hence, in an ecosystem that have a high primary productivity, there would be a rapid rate of conversion of solar energy to biomass via PHOTOSYNTHESIS.