A is anything in the environment that affects the behavior of an organism. tropism
hormone
stomata
stimulus

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How many variables are altered in a good experiment? a.1 b.0 c.2 d.3

New york city has 2,181 inhabitants per square mile. the state of alaska has 1.03 inhabitants per square mile. ecologists would say alaska has a low exponential growth population density birth rate carrying capacity

19. a cell is viewed under a microscope and is found to have two nuclear envelopes and spindles that appear to be breaking apart. which phase of mitosis is the cell most likely in? a. metaphase b. prophase c. telophase d. anaphase