DNA evidence indicates that _____ were probably the first land plants
1.liverworts
2.club mosses
3.ferns
4.hornworts
1
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Mutants that are lacIS do not produce lac enzymes, regardless of the presence or absence of lactose
Indicate whether the statement is true or false
Which classification level would be the least inclusive?
a. genus b. family c. phylum d. order e. class
Temperature changes can affect the ability of water to dissolve and keep materials in solution. Which statement below is an appropriate hypothesis concerning water temperature and dissolved oxygen?
A) Lower water temperatures allow for lower concentrations of dissolved oxygen. B) Higher water temperatures allow for higher concentrations of dissolved oxygen. C) Lower water temperatures allow for higher concentrations of dissolved oxygen. D) Water temperatures do not affect the concentration of dissolved oxygen.
Birds excrete their nitrogenous wastes in the form of
A) uric acid. B) ammonia. C) amine groups. D) urea. E) amino acids.