Does a bacterial cell have DNA stored in the nucleus?

Name the type of chemical that speeds up digestion

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above