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?

1. Package the swab in a paper envelope.
2. Moisten a sterile cotton swab with distilled water.
3. Gently rub the stain, covering the entire swab.
4. Allow the swab to dry thoroughly.
5. Shake off the excess water.

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Which of the following statements is most likely correct about a rock belonging to the jurassic age and a rock belonging to the cambrian age? options: 1) they have identical fossils of organisms that have evolved over time. 2) both have animal fossils preserved in them due to weathering and erosion. 3) they contain different fossils because life on earth has changed through time. 4) the fossils in them were formed on the surface of earth due to exposure to sunlight.

Approximately percent of the energy created by cell metabolism is used by the body to carry on its normal functions, such as respiration, digestion, reproduction, muscular movement, circulation, and cellular regrowth.