Unit 3 Review Biology

Front

What is the primary function of the greenhouse effect?

Back

To warm the Earth's atmosphere by trapping radiant heat from the sun.

Front

How are atmospheric carbon dioxide and temperature related?

Back

As the level of CO2 increases, so do global temperatures.

Front

What is an autotroph?

Back

An organism that makes its own food through photosynthesis.

Front

What would happen to the food web if the trees were destroyed?

Back

There would be less energy available overall.

Front

If there were 80,000 kg of biomass at the Producer Level, how much would be available at the Tertiary level?

Back

80 kg.

Front

Define biomass.

Back

The total mass of living matter within a given area, usually measured in kilograms.

Front

What is photosynthesis?

Back

The process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll.

Front

Explain the role of producers in an ecosystem.

Back

Producers, such as plants, convert solar energy into chemical energy through photosynthesis, forming the base of the food web.

Front

What is the difference between a food chain and a food web?

Back

A food chain is a linear sequence of organisms where each is eaten by the next, while a food web is a complex network of interconnected food chains.

Front

What is the significance of decomposers in an ecosystem?

Back

Decomposers break down dead organic matter, recycling nutrients back into the soil and supporting plant growth.