Answer: They usually run tests too see. For example, that's why they made blood tests. They take you blood from you, and run tests to see if you have a disease.
Explanation: Hope it helps!
Answer:
These causes include habitat modification and fragmentation, introduced predators or competitors, introduced species, pollution, pesticide use, or over-harvesting. However, many amphibian declines or extinctions have occurred in pristine habitats where the above effects are not likely to occur.
Explanation:
Answer:
Evaporation, transpiration, condensation, precipitation
Explanation:
Let's work it not in order. Falling down is precipitation so we can rule out any ones that don't have precipitation at the end. Moisture turns into vapor, that's evaporation so that should be first. In just those 2 steps we've ruled out 3 answers. There's your answer!
No organism is always the first step, except in a wide sense, plants. In the water, plankton is found in first but whereas on land, plants or seeds are eaten first.
Hope it helped!! :)