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The purpose of controlling the environment when testing a hypothesis is ultimately to get a reliable result to the study.
hypothesis
the science of the environment is called ecology
rocky and dry conditions
no. a hypothesis would be what he proposed is the reason for the declination of the salamanders. the statement you posted is just an observation
Because DDT degrades slowly in the environment and is toxic it is considered a polluting substance.
They lived in a rocky area
becauseof unconditional environment
A hypothesis
The Rocky Mountain Tailed Frog (Ascaphus montanus) has no known call.Specifically, Rocky Mountain Tailed Frogs lack external eardrums. They live in and around rapidly flowing streams. Such a noisy environment gets in the way of communicating by sound, and Rocky Mountain Tailed Frogs are not known to vocalize at all.
Dry and barren, the rain is unstable, rocky and under ground rivers, oasis appear above them
Blue sheep are slightly better adapted to the rocky mountainous terrain