The physical features and chemical composition of the rocks that contain fossils provide information about the ____ in which the fossil organisms lived
Fill in the blank with the appropriate word.
environment
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An ecosystem includes ________ along with ________
A) macroorganisms / microorganisms B) living organisms / their chemical and physical environments C) pathogenic organisms / non-pathogenic organisms D) single celled organisms / multi-cellular organisms
Chlorophyll absorbs primarily __________ and __________ regions of the visible spectrum
a. blue; red b. green; yellow c. red; green d. red; yellow e. blue; yellow
When hyperplasia develops, signaling a loss of control of cell division, it always results in cancer
Indicate whether the statement is true or false
An antigen is:
a. a phagocytic cell. b. used to combat infections. c. a molecule used by bacteria to destroy antibodies. d. any molecule that is recognized as foreign by the immune system. e. any molecule that is recognized as natural by the immune system.