Sapwood is functional secondary xylem. Indicate whether the statement is true or false
True
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Konrad Lorenz taught ducks to behave as though he were their mother by providing the appropriate stimulus during a sensitive period. This form of learning is called
A) classical conditioning. B) fixed action behavior. C) altruism. D) habituation. E) imprinting.
A developer putting tract housing in a previously pristine area plans numerous small open space areas
where the original habitat is to remain. As a conservationist, how would you suggest changing the plan, if at all? (Canceling the development is not an option.)
What will be an ideal response?The dotted areas in the figure below indicate where
__________ reactions will occur to produce __________ and __________. a. condensation; covalent bonds; hydroxyl ions b. electron transfer; covalent bonds; water molecules c. condensation; covalent bonds; water molecules d. cleavage; covalent bonds; hydrogen ions e. condensation; ionic bonds; hydrogen ions
Major changes in ocean conditions during the early Cambrian period were probably linked most closely to the evolution of __________.
a. cyanobacteria b. algae c. suspension-feeding animals d. large and motile predatory animals e. vertebrates