Answer:
D.
They break down dead organisms.
Explanation:
Not directly. Detectors can convert to a form that is visible to the human eye. Hope that helps
Answer: intraspecific competition
hopes this helps.
Various reasons why five trained individuals might come up with different readings are - while carrying out an experiment, the accuracy with which each individual perform an experiment varies. The readings in different instruments used while performing an experiment also differs.
There is certain percentage of error that occurs while carrying out an experiment by each of the individual. Physical conditions such as temperature, pressure changes from one place to another where the experiments are being carried out.