The most simple answer I can think of would be that improper handling can cause damage to the test subject, which would effect the results, making them unreliable.
Answer:
Because in 1900s more revolutions took place and more pollution was done.
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Answer: The inputs, or reactants, of cellular respiration are glucose and oxygen. The outputs, or products, of cellular respiration are water, carbon dioxide
Answer: D
Explanation:
photosynthesis - takes in water, energy from the sun, and carbon dioxide and releases oxygen and glucose (sugar)
respiration - takes in glucose and oxygen, and releases water and carbon dioxide and energy
they are basically the opposite
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The most common pathogen then carry is protozoa , that causes malaria
