In the Section "Investigating Life: Discovering the 'Fishapod'",Tiktaalik Either Crawled

question 23

Multiple Choice

In the section "Investigating Life: Discovering the 'Fishapod'",Tiktaalik either crawled or paddled in shallow tropical streams about 380 mya,during the late Devonian period.These shallow waters often became anaerobic.What selective advantage did Tiktaalik have under these conditions?

• A)It could lift its head out of the water and breathe air through its gills.
• B)It could crawl out of the water and walk over to new shallow streams.
• C)It could swim better than fish.
• D)It could crawl on shore and feed on birds and reptiles that were on lanD.
• E)It could lift its head out of the water and breathe air through its lungs.

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Definitions:

Molars

Molars are large, flat teeth at the back of the mouth, used primarily for grinding food.

Permanent Set

A long-lasting alteration of form or position, especially in hair styling, or a condition of being fixed in a particular stance or position.

Bicuspids

Also known as premolars, these are types of teeth located between the canine and molar teeth in the human dentition, primarily involved in crushing and grinding food.

Canines

Pointed teeth located between the incisors and premolars, used for tearing food.