If true, which of the following would be most important in determining whether P. chromatophora's chromatophore is still an endosymbiont, or is an organelle, as the term chromatophore implies?
A) if P. chromatophora is less fit without its chromatophore than with it
B) if the chromatophore is less fit without the host cercozoan than with it
C) if there is ongoing metabolic cooperation between the chromatophore and the host cercozoan
D) if there has been movement of genes from the chromatophore genome to the nuclear genome, such that these genes are no longer present in the chromatophore genome
D
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Experimenters replaced the statoliths in a crayfish statocyst with iron filings and then held a magnet above the animal. Based on your knowledge of the function of statoliths, what would they observe?
A. The crayfish stayed upright. B. The crayfish lay on its side. C. The crayfish turned upside down. D. The crayfish attempted to escape by rapidly swimming backwards. E. None of these choices are correct.
Escherichia coli bacteria in human colons provide humans with vitamin K in return for a steady food supply and warm place to live. This is an example of a ____ relationship
a. mutualistic b. predatory c. commensal d. parasitic e. habitat
Water is neither hydrophilic nor hydrophobic, as these terms only define the interaction of other molecules with water molecules.
a. true b. false
A(n) ________ is defined as damage to a ligament that can take longer to heal than muscular damage because the ligament does not have a large blood supply
Fill in the blank(s) with correct word