Most Fossils ____

question 30

Multiple Choice

Most fossils ____.  

• A) are found in sedimentary layers of rock
• B) form without water
• C) contain remnants of soft body parts
• D) represent the least common species found in an area
• E) have been formed by exposure to air

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Definitions:

Placentals

Mammals that nourish their developing fetus via a placenta, an organ that facilitates the exchange of nutrients, gases, and wastes between the mother and fetus.

Notochord

A flexible rod-shaped structure that provides support in the embryonic stages of all chordates, including humans.

Tunicates

Marine invertebrates, also known as sea squirts, that are part of the subphylum Tunicata, characterized by a tough outer tunic and filter-feeding mode of nutrition.

Lancelets

Small marine animals belonging to the subphylum Cephalochordata, characterized by their fish-like shape and a notochord extending the length of their body.