11.1 sg Flashcards
What is biomass?
Biomass is the total mass of living matter in a given area or volume.
True or False: Biomass can include both plant and animal matter.
True
What process do plants use to convert sunlight into energy?
Photosynthesis
Fill in the blank: The primary source of energy for photosynthesis is ______.
sunlight
Which gas do plants absorb during photosynthesis?
Carbon dioxide
What is the equation for photosynthesis?
6CO2 + 6H2O + light energy → C6H12O6 + 6O2
What is primary productivity?
The rate at which energy is converted by photosynthetic and chemosynthetic autotrophs to organic substances.
Multiple Choice: Which of the following is a measure of biomass? A) Dry weight B) Volume C) Length D) Temperature
A) Dry weight
True or False: Productivity is only measured in terrestrial ecosystems.
False
What does net primary productivity (NPP) represent?
The amount of organic matter available for consumption by heterotrophs after accounting for the energy used in respiration.
Fill in the blank: Photosynthesis primarily occurs in the ______ of plant cells.
chloroplasts
What role does chlorophyll play in photosynthesis?
Chlorophyll absorbs light energy necessary for the photosynthesis process.
Short Answer: Name one factor that can affect the rate of photosynthesis.
Light intensity, temperature, or carbon dioxide concentration.
What is the difference between gross primary productivity (GPP) and net primary productivity (NPP)?
GPP is the total amount of energy captured by photosynthesis, while NPP is GPP minus the energy used for respiration.
Multiple Choice: Which ecosystem typically has the highest productivity? A) Desert B) Tropical rainforest C) Tundra D) Grassland
B) Tropical rainforest
