Which will occur when two organisms in the same habitat occupy the same niche? A. competition

B. mutation

C. geographic isolation

D. symbiosis

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Which type of respiration takes place when there is no oxygen present

Ronald wants to see if a new shower cleaner works better in removing soap than his old cleaner. he uses the new cleaner on one half of the shower tiles and his old cleaner on the other half. identify the independent and dependent variables in this experiment. enter your answer in the space provided.

What type of appendages do sponges cnidarians roundworms annelids mollusks arthropods echinoderms and vertebrate have? jointed, not jointed, absent