Tobacco products have been identified has mutagens. However, some tobacco users develop cancer and some do not. The reason for this apparent inconsistency is

Select the correct answer. Which isotope is used to date ancient artifacts such as fossils? O A. carbon-12 O B. carbon-14 O c. uranium-238 OD. oxygen-16

3 ways living creatures use carbohydrates

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Why is it important that a scientist keep accurate records of an experiment he conducts? A. in order to keep an accurate record of how many hours he spent in the lab B. in order to back up the conclusions he publishes as a result of the experiment C.

The oldest known fossils on Earth are most similar to: animals plants fungi bacteria

Briefly describe the steps of protein synthesis

Which tissue contains a calcified ground substance and is specialized for structural support? a. muscle tissue b. dense regular connective tissue c. areolar connective tissue d. bone connective tissue

This question refers to the same populations of mosquito fish as the previous question. Based on the evidence given in your textbook, can you state that the mosquitofish have speciated into different species, or not?

What is happening when cells start to swell up with water?

What practical problem led alexander fleming to carry out his experiments with bacteria?