Amoebozoans are heterotrophic protists with cells that lack ____; therefore, they can constantly change shape
a. cell junctions
b. a cytoskeleton
c. a cell membrane
d. a cell wall or pellicle
e. pseudopods
d
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True or false: autosomal trisomies are associated with the X or Y chromosome
A. true B. false
A hydrogen bond is
a. a sharing of a pair of electrons between a hydrogen and an oxygen nucleus. b. a sharing of a pair of electrons between a hydrogen nucleus and either an oxygen or a nitrogen nucleus. c. an attractive force that involves a hydrogen atom and an oxygen or a nitrogen atom that are either in two different molecules or within the same molecule. d. found only in water molecules. e. is the strongest form of chemical bond.
What are the two specific "conditions" within the definition of Osmosis that makes it different than simple diffusion?
a. movement of water; concentration gradient b. movement of water; through selectively permeable membrane c. movement of molecules; through selectively permeable membrane d. Brownian motion; Concentration gradient
Animals that participate in the life cycles of pathogens and transmit pathogens from host to host are
A. aerosols. B. fomites. C. mechanical vectors. D. droplet nuclei. E. biological vectors.