Which of these statements is NOT correct about flatworms?
A. Flatworms are deuterostomes.
B. The embryos of flatworms are triploblastic.
C. Flatworms have a sac body plan with an incomplete gut.
D. Flatworms are in phylum Platyhelminthes.
E. Flatworms are free-living or parasitic.
Answer: A
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What is the difference between a nucleotide and a nucleoside?
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A new drug interferes with the function of the dendrites of a neuron. What will happen to this neuron?
A) The neuron will continuously send signals. B) The neuron cannot be stimulated to send a signal along its axon. C) The neuron will die off. D) The neuron will sometimes send signals and will sometimes not send signals.
The main nitrogenous waste of adult amphibians is:
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