Pikaia gracilens,the earliest known chordate collected from the Burgess Shale of British Columbia,closely resembles
A) the amphioxus lancelet.
B) living sessile tunicates.
C) the ammocoete larva.
D) an adult larvacean.
E) the lamprey.
Correct Answer:
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Q28: While several invertebrate groups (phyla)have in the
Q29: Lancelets belong to the subphylum _.
Q30: The skeletal rod found in all chordates
Q31: The lancelet reproduces
A)by asexual processes alone.
B)by budding.
C)sexually
Q32: "Sea squirts," the most common kind of
Q34: The ammocoete larvae is important in zoology
Q35: Walter Garstang's hypothesis of vertebrate evolution could
Q36: What feature(s)can be found in the ammocoete
Q37: Pelagic tunicates with barrel-shaped bodies and complex
Q38: Tunicates belong to the subphylum _ (Tunicata).
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