Kevin is a crime scene investigator. He believes he has found saliva on the floor of a crime scene. Since he cannot cut out a piece of the floor, which steps should he perform to collect the saliva sample? Package the swab in a paper envelope.

Moisten a sterile cotton swab with distilled water.

Gently rub the stain, covering the entire swab.

Allow the swab to dry thoroughly.

Shake off the excess water.\

Need these answers in what he should do to shouldn't

In 1859, charles darwin published the first edition of on the origin of species, which explained his observations of various groups of animals that showed great similarities but minor differences. darwin concluded that if a population of one species separates into two different populations that live in separate locations, then over the course of many generations the different populations can develop into different species. this idea predicted many future biological findings and became the basis of modern biology. darwin’s explanation for why different species exist is best described as a(n) law. theory. inquiry. hypothesis.