What was the 350 million-year-old fossil called Ichthyostega?
A) A lobe-finned fish that represents the likely ancestor to the amphibians
B) One of the earliest known tetrapods
C) A lizard-like stem reptile
D) A ray-finned fish that gave rise to the amphibians
E) The first fish-to-amphibian transitional form to have lost fin rays and gill bones,thus committing itself to a land existence
Correct Answer:
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Q1: What change(s)does an animal that moves from
Q2: Most terrestrial salamanders fertilize eggs using which
Q3: The term "tetrapods"
A)refers to the organisms that
Q5: Which is true regarding the oxygen content
Q6: Tetrapods originated in the _ period.
A)Permian
B)Cambrian
C)Carboniferous
D)Devonian
E)Silurian
Q7: Which of the following regulates amphibian metamorphosis?
A)Calcitonin
Q8: The sequence of Eusthenopteron,Acanthostega,and Ichthyostega fossils show
Q9: Moving from fish to amphibians,we see which
Q10: The Urodela
A)are hermaphroditic.
B)are tadpoles when young.
C)retain their
Q11: Amphibians were the first vertebrate invaders of
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