Autoimmune disorders can result from an inability to produce antibodies.
a. true
b. false
Answer: b. false
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In your own words, describe one step in the walking cycle.
What will be an ideal response?
Every species has a unique two-word name called the
A. scientific name. B. genus. C. phylogeny. D. evolutionary tree. E. clade.
A lizard with a striped tail is crossed with one having a spotted head, producing normal looking (no
stripes or spots) lizard progeny. What progeny would be expected to be produced by mating these progeny with each other, if the genes conferring stripes and spots were on different chromosomes? a. equal numbers of normal, striped, spotted and striped, and spotted b. 3 striped : 1 spotted c. 9 striped and spotted : 3 spotted : 3 striped : 1 normal d. 9 striped : 3 spotted : 1 striped or spotted e. 9 normal : 3 striped : 3 spotted : 1 striped and spotted
Is the study presented above a controlled experiment?
A) Yes, because only the amount of fertilizer was changed, everything else was kept the same. B) Yes, because many pots were used. C) No, because the experiment was done only once. D) No, because several different amounts of fertilizers were used, not just one amount.