Biology Midterm Review

Front

In a chemical process, what happens to atoms?

Back

Atoms are rearranged and energy is absorbed or released.

Front

What are the building blocks of proteins?

Back

Amino acids.

Front

What is the energy transfer efficiency between trophic levels?

Back

About 90% of available energy is lost at each trophic level, leaving only 10% for the next level.

Front

What does 'trophic level' refer to?

Back

The position an organism occupies in a food chain.

Front

True or False: The body must chemically rearrange smaller molecules or atoms to produce amino acids.

Back

True.

Front

What is the primary function of proteins in the body?

Back

Proteins serve as building blocks for tissues, enzymes, and hormones.

Front

Define 'niche' in an ecological context.

Back

A niche refers to the role or function of an organism or species within an ecosystem.

Front

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

Back

A food chain is a linear sequence of organisms through which nutrients and energy pass, while a food web is a complex network of interconnected food chains.

Front

What is photosynthesis?

Back

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

Front

What role do decomposers play in an ecosystem?

Back

Decomposers break down dead organic material, recycling nutrients back into the ecosystem.