Which of the Following Is(are) TRUE of Photoautotrophs

question 4

Multiple Choice

Which of the following is(are) TRUE of photoautotrophs?

• A)They are responsible for the first concentration of free oxygen in the atmosphere.
• B)They are responsible for an early extinction of most anaerobic organisms.
• C)They are carbon-rich food baskets for heterotrophs.
• D)They are responsible for the presence of the ozone layer of the atmosphere
• E)All of these are true.

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Definitions:

Natural Selection

A fundamental mechanism of evolution where organisms better adapted to their environment tend to survive and produce more offspring.

Variability

The degree to which different data points in a set differ from each other and from their average value.

Competition

A situation in which individuals or groups strive against one another to achieve a goal that is limited and cannot be shared.

Melting-pot View

The perspective that different cultures, peoples, or societies blend together into a single, homogeneous culture, losing their individual identities.