The Messenger Spacecraft Made the First Discovery Of

question 541

Multiple Choice

The Messenger spacecraft made the first discovery of:

• A) the Caloris Basin.
• B) dormant volcanoes on Mercury.
• C) scarps on Mercury's surface.
• D) active volcanoes on Mercury.

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Definitions:

Ecological Niches

The role and position a species occupies in its environment, including all interactions with biotic and abiotic factors.

Monophyletic Group

An ancestor in which a derived trait evolved, together with all of its descendants.

Derived Trait

A character that is present in a clade under consideration, but not in any of the clade’s ancestors.

Stabilizing Selection

A type of natural selection that favors intermediate variants by acting against extreme phenotypes, leading to a decrease in a population's genetic variance.