AP BIOLOGY

ECOLOGY

ENERGY FLOW AND PRIMARY PRODUCTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What unit is used when illustrating energy in a system model?
A
biomass per unit area
B
J m-2yr-1
C
g m-2
D
productivity
Explanation: 

Detailed explanation-1: -Typical units of biomass are grams per meter squared (g/ m2), although you will also see kg/m2, lb/ ft2, etc. While knowing an ecosystem’s biomass is. useful for many applications such as.

Detailed explanation-2: -A pyramid of biomass represents the standing stock or storage of each trophic level, measured in units such as grams of biomass per square metre (g m–2).

Detailed explanation-3: -Much of the energy in ecological systems, however, is stored as potential energy in the form of chemical bonds formed in the tissues of individual organisms. The rate of energy expenditure in an ecological system is measured as watts (W), which is the number of joules expended per second ( J s−1).

Detailed explanation-4: -Primary production is defined as the amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis.

There is 1 question to complete.