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Explain why fossil specimens of Haikouella lanceolata offer many clues to understanding the evolution of vertebrates from cephalochordates.
Q2: The Class Enteropneusta are also known as
Q7: What is the process called in which
Q9: Adult eels from both Europe and North
Q24: The stages in the life cycle of
Q26: A Nautilus differs from a snail because<br>A)the
Q31: Outline the mode of infection of two
Q36: Which is a correct association of pigment
Q36: The calciferous glands in the earthworm<br>A)produce enzymes
Q50: What is the difference between an osmotic
Q55: Members of the Phylum Sipuncula are also