Based on the Age of the Light- and Dark-Colored Regions

question 42

Multiple Choice

Based on the age of the light- and dark-colored regions of the Moon and the number of craters observed in these regions,we know that impacts in the inner Solar System:

• A) rapidly decreased approximately 3 billion years ago.
• B) rapidly decreased approximately 1 billion years ago.
• C) were very rare in the past 4.5 billion years.
• D) occurred at approximately a constant rate throughout most of the age of the Solar System.

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Definitions:

Bud Scales

Protective structures that cover the developing bud of a plant, helping to shield it from environmental damage and desiccation.

Guttation

The exudation of small droplets of water from the pores of plants, typically occurring at the leaf margins or tips.

Modified Leaf

A leaf of a plant that has altered form or function from the standard flat, photosynthetic structure, often serving roles in reproduction, protection, or storage.

Modified Leaf

A leaf that has evolved to serve functions other than photosynthesis, such as protection or reproduction.