Biology Review Part 2 Fall 2024

Front

What role do bacteria play in the nitrogen cycle?

Back

Bacteria play a crucial role in the nitrogen cycle by converting nitrogen gas from the atmosphere into forms that plants can use, such as ammonia and nitrates.

Front

How does energy transfer efficiency affect the number of trophic levels in an energy pyramid?

Back

Energy transfer efficiency limits the number of trophic levels because only a small percentage of energy is transferred to the next level.

Front

Which organisms are capable of performing photosynthesis?

Back

Only autotrophs are capable of performing photosynthesis.

Front

What is the impact of energy loss at each trophic level on top predator populations?

Back

Energy loss at each trophic level decreases the population size of top predators.

Front

What process captures energy from sunlight in ecosystems?

Back

Photosynthesis is the process that captures energy from sunlight in ecosystems.

Front

Define autotrophs.

Back

Autotrophs are organisms that produce their own food using sunlight or chemical energy, such as plants and some bacteria.

Front

Define heterotrophs.

Back

Heterotrophs are organisms that cannot produce their own food and must consume other organisms for energy, such as animals and fungi.

Front

What is an energy pyramid?

Back

An energy pyramid is a graphical representation that shows the flow of energy through different trophic levels in an ecosystem.

Front

Explain the concept of trophic levels.

Back

Trophic levels are the hierarchical levels in an ecosystem, defined by how organisms obtain energy, including producers, primary consumers, secondary consumers, and top predators.

Front

What is the significance of photosynthesis in ecosystems?

Back

Photosynthesis is significant because it is the primary means by which energy enters an ecosystem, supporting all life forms.