Is pathogen a bacteria and a virus? Or just a virus or just a bacteria ?

What is a cordon and where is it found

What is the difference between a scientific hypotheses and a scientific theory?

Which of the following is a good definition for the word adaptation? question 1 options: a trait that an organism survive and reproduce in its environment. a change in an organism's environment. the way in which animals obtain food. a temperature change that can cause the extinction of plants and animals.