Women and men typically have the same normal microbiota in their reproductive systems
Indicate whether the statement is true or false
FALSE
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A bacterium that uses CO2 as an electron source but CANNOT use it as a carbon source is considered a mixotroph
Indicate whether the statement is true or false.
Which one of the following statements about archaeans is false?
A) Archaeans are more closely related to eucaryotes than they are to bacteria. B) Both archaeans and bacteria are procaryotic organisms. C) Some archaeans live in extremely hot environments. D) The cell walls of archaeans contain a thicker layer of peptidoglycan than the cell walls of bacteria.
Molecular-based phylogies place the phylum Platyhelminthes in the Protostomia. How do scientists best explain the morphological differences between flatworms and the other members of the Lophotrochozoa?
A. Modern Platyhelminthes do not have a coelom but did originate from an ancestor that had one. B. The Platyhelminthes clade separated from other clades before coeloms evolved and consequently Platyhelminthes have never had a coelom. C. Platyhelminthes originated from ancestors with a coelom and have retained it to the present time. D. Platyhelminthes evolved from an ancestor without a coelom but developed one during the course of their evolution. E. Some Platyhelminthes have a coelom but others do not and it is difficult to conclude anything about its evolution within the clade.
Which receptor type makes you aware that your appendix is inflamed?
a. mechanoreceptors b. photoreceptors
c. chemoreceptors d. thermoreceptors e. nociceptors