Which structure is not a major diagnostic feature of the chordates?
a. dorsal hollow nerve cord.
b. notochord.
c. pharyngeal gill slits.
d. vertebral column.
d
Biology & Microbiology
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Four of the five answers listed below are cofactors or coenzymes. Select the exception
a. mineral b. water soluble vitamin c. metallic ions d. NAD+ e. protein
Biology & Microbiology
Mad cow disease is an example of an infection caused by a:
a. bacterium. b. bacteriophage. c. retrovirus. d. viroid. e. prion.
Biology & Microbiology
What cytokine stimulates plasma cells to secrete IgA?
A) interleukin-5 B) interleukin-10 C) interleukin-4 D) interferon-gamma E) interferon-alpha
Biology & Microbiology
Explain why a food web gives a better picture of a community than does a food chain
What will be an ideal response?
Biology & Microbiology