Unit 2 Study Guide Flashcards

Front

Biological Organization

Back

Biological Organization is arranged by how many organisms are in the level.

From least to most complex: organisms, populations, communities, ecosystem, and biosphere.

Front

Examples of Each Biological Organization Level

Back

Organism - Frog

Population - Army of Frogs

Community - An army of frogs, a flock of birds, and a school of fish

Ecosystem - A pond

Biosphere - Earth

Front

1st Law of Thermodynamics

Back

Energy cannot be created nor destroyed, but only converted from one form to another.

Front

10% Rule & Energy Flow

Back

As you go up a food chain, only 10 percent energy is preserved and passed on.

Ex: Grass (100%) --> Rabbit (10%)

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• Trophic Levels/Food Chains/Food Webs

Back

Trophic levels are the position of an organism in a food chain/web. A food chain is a linear series of organisms that eat one another. A food web is a collection of food chains.

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• Succession

Back

Succession is the process of organism inhabiting an area overtime. There are two type of succession: Primary and Secondary.

Front

Primary vs Secondary Succession

Back

Primary Succession starts from bare rock and builds an ecosystem from there. Secondary Succession starts from an already existing ecosystem which was destroyed in some way. Pioneer species for primary succession would be moss and lichen, for secondary, it would be grass and flowers. A climax community for both would be luscious trees and other plants with animals inhabiting them.

Front

• Biodiversity, Biomass, Ecosystem Complexity

Back

Biodiversity is the variety of all living things on earth. Biomass is renewable energy from plants and animals. Ecosystem complexity is a way to describe a state of an ecosystem. The more biodiverse an ecosystem is, the complex it is as well.