From an evolutionary perspective, true nerve cells are first seen in the phylum:a

Porifera.
b. Cnidaria


c. Ctenophora.
d. Mollusca.
e. Arthropoda


b

Biology & Microbiology

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Which cycle relies heavily upon bacteria?

a. water b. carbon c. nitrogen d. phosphorus e. sedimentary

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The mapping of the human genome in the mid-1980s was integral for identifying new human genetic markers because of the identification of what types of polymorphic DNA markers?

What will be an ideal response?

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A primitive groove is the equivalent of a:

a. neural crest.

b. branchial groove. c. blastodisc. d. blastopore. e. neural groove

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What is hypotonic

What will be an ideal response?

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