What is the role of the epiglottis?
A. Prevents food from entering the windpipe
B. Produces vocal sounds
C. Filters dust and other impurities from entering the respiratory system
D. Produces the positive or negative pressures that force air into or out of the lungs
Answer: A
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A phylogenetic tree is a diagram that describes a phylogeny. A phylogeny is
A. the evolutionary history of a species or group of species. B. the geographic distribution of populations in a species. C. the generations of individuals in a population. D. the distribution of species in a given area in time. E. a list of character traits of individual species set in a tree diagram.
Recombination involves the breakage and reunion of DNA molecules from
A) homologous nonsister chromatids. B) homologous sister chromatids. C) heterologous nonsister chromatids. D) heterologous sister chromatids.
A species that that obtains mixed nutrition, from consuming other animals as well as converting solar energy into organic compounds, is termed a:
What will be an ideal response?
The ________ ________ is the substrate concentration needed for an enzyme to achieve half maximal velocity.
What will be an ideal response?