If Relatively Small Carbonaceous Chondrites from Space Were a Significant

question 7

Multiple Choice

If relatively small carbonaceous chondrites from space were a significant source of Earth's original amino acids, then which two of these would have been most important in permitting their organic materials to survive impact with Earth?
I. Carbonaceous chondrites must contain no D-amino acids.
II. Earth's early atmosphere must have had little free oxygen.
III. The chondrites must have arrived on Earth before 4.2 billion years ago.
IV. Earth's early atmosphere must have been dense enough to dramatically slow the chondrites before they impacted.
V. The chondrites must have impacted land, rather than a large body of water.

• A)I & II
• B)II & III
• C)II & IV
• D)II & V
• E)III & IV

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Definitions:

Row Percentages

The percentages of each category within a row in a contingency table, often used in categorical data analysis.

Frequencies

The rate at which a repeated event occurs, often used in the context of how often different values appear in a dataset.

Stacked Bar Chart

A graphical representation of data where bars divided into sub-parts represent the whole and its segments.

Relative Frequency

The proportion of times a value occurs in relation to the total number of outcomes, often expressed as a percentage.