Although Earth is estimated to be 5 billion years old, and although life first appeared about 4 billion years ago, land plants did not appear until about _______ years ago.
A) 3-4 billion
B) 400-500 million
C) 40-50 million
D) 3-4 million
E) 400,000-500,000
Correct Answer:
Verified
Q1: Which of the characteristics below links the
Q3: Much evidence indicates that _ are a
Q4: Plants invaded the land sometime during the
Q5: Which of the following is not a
Q6: The leptosporangiate ferns
A) are not a monophyletic
Q7: The rhyniophytes
A) lacked tracheids.
B) possessed true roots.
C)
Q8: You find a green "leafy" bryophyte growing
Q9: Which statement is not true of the
Q10: Club mosses and horsetails
A) have larger gametophytes
Q11: Which statement is not evidence for the
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