At which number on the phylogenetic tree did bony skeletons evolve?
A. 1
B. 2
C. 3
D. 4
E. 5
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, B
8. The lancelets are found
A. as parasites inside the tracts of fish.
B. very rarely in mountain streams, where they are almost extinct.
C. commonly in the sandy bottoms of shallow coastal waters around the world.
D. on the bottom of the ocean.
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C
At which number on the phylogenetic tree did vertebrates evolve four limbs,
becoming tetrapods?
A. 1
B. 2
C. 3
D. 4
E. 5
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A. 1
B. 2
C. 3
D. 4
E. 5
Give this one a try later!
, B
8. The lancelets are found
A. as parasites inside the tracts of fish.
B. very rarely in mountain streams, where they are almost extinct.
C. commonly in the sandy bottoms of shallow coastal waters around the world.
D. on the bottom of the ocean.
Give this one a try later!
C
At which number on the phylogenetic tree did vertebrates evolve four limbs,
becoming tetrapods?
A. 1
B. 2
C. 3
D. 4
E. 5
Give this one a try later!
