Mid term

Front

What is mutualism?

Back

Mutualism is a type of symbiotic relationship where both organisms benefit from the interaction. An example is lichen, which is a combination of algae and fungus.

Front

How do atoms like oxygen, carbon, and nitrogen move through an ecosystem?

Back

They cycle through the ecosystem through living and nonliving things over and over.

Front

True or False: Fertilizers used for growing crops always stay within the boundaries of the farm.

Back

False. Fertilizers can run off into nearby water bodies, affecting ecosystems.

Front

What is more likely for an atom with 3 valence electrons: to gain 5 electrons or to lose 3 electrons?

Back

It is more likely to lose 3 electrons to achieve a full outer shell.

Front

What do polar molecules do?

Back

Polar molecules form hydrogen bonds due to their uneven charge distribution.

Front

Define commensalism.

Back

Commensalism is a type of symbiotic relationship where one organism benefits and the other is neither helped nor harmed.

Front

What is competition in an ecosystem?

Back

Competition occurs when two or more organisms vie for the same resources, such as food, water, or space.

Front

What is parasitism?

Back

Parasitism is a relationship where one organism benefits at the expense of another, often harming it.

Front

What is the role of decomposers in an ecosystem?

Back

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

Front

What is a food chain?

Back

A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another.