The Theory That All Forms of Life Descended from a Common

question 39

Multiple Choice

The theory that all forms of life descended from a common ancestor through a branching of lineages constitutes Darwin's theory of

• A)perpetual change.
• B)common descent.
• C)multiplication of species.
• D)natural selection.

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Definitions:

Gills

Respiratory organs in certain aquatic organisms, allowing them to extract oxygen from water.

Gases

Substances that are in the state of matter characterized by having neither a defined volume nor shape, expanding to fill their container.

Terrestrial

Terrestrial refers to things relating to the Earth or living or growing on land as opposed to water or air.

Aquatic Environments

Natural water bodies like rivers, lakes, and oceans that are habitats for a wide range of organisms.