All species in the phylum Arthropoda share which of the following features?
a. segmented bodies
b. book lungs
c. three sets of legs
d. a fused thorax
a. segmented bodies
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Which of the following carries amino acids to
ribosomes, where amino acids are linked into the primary structure of a polypeptide? a. mRNA b. tRNA c. hnRNA d. rRNA e. all of these
What are the four Koch’s postulates in identifying pathogens that cause a particular disease? What will be an ideal response?
Any relationship in which one organism lives and feeds either inside or on the outer surface of another organism, harming the organism in the process, is classified as
a) commensalism b) parasitism c) none of the other choices d) mutualism
Why are embryonic stem cells different from adult stem cells?
a. they can become any kind of cell (totipotent) b. they are haploid c. they have different genes d. they are committed