Which is not one of the functions of enzymes in the body? a. speeding up chemical reactions c. keeping activation energy at a safe level b. absorbing energy d. act as a biological catalyst

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above

The cluster of developing cells from conception until birth is called an

Ascientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas which group of statements best describes all of the materials he is using in the investigation?