Unit 28: Life in the Universe TEST

The assumptions of mediocrity favor the existence of extraterrestrial life.

• False

• True

The definition of life only requires that to be considered "alive" you must be able to produce.

• False

• True

Miller and Urey conducted experiments in which they produced biological molecules from non-biological molecules.

• False

• True

Organic molecules important for life could have reached Earth's surface via comets.

• False

• True

Organic molecules are known to exist only on Earth.

• False

• True

Laboratory experiments have succeeded in creating living cells from non-biological molecules.

• False

• True

For most of the history of Earth, life consisted of only single-celled life forms.

• False

• True

The rate of star formation in the Galaxy is reasonably well known.

• False

• True

As of yet there is no direct evidence that Earth-like planets orbit other stars.

• False

• True

In estimating whether intelligence arises and develops technology, we have only life on Earth as examples.

• False

• True