What molecule holds the nitrogen bases together in the DNA twisted configuration?

How many panda years equal 1 human year?

Which gas supplies the energy for storms

3. Which statement best describes the Richter scale? A. It's a test given to all geologists. B. It's a numerical system that measures the smallest seismic waves during an earthquake. C.

Which of these chemicals is needed in order for the metabolic reactions of photosynthesis to occur? A) fructose B) glucose C) oxygen D) water

What cells were choloroplants present in? What did they look like in various cells?

Different types of normal tissues in the human body have different mitotic indices. From the following list, which normal tissues would you expect to have the highest mitotic index: muscle, skin, kidney, or lung? Explain your answer.

A group of scientists decided to post their research results on the Internet instead of publishing in a scientific journal. What part of the scientific process have they skipped and why does it matter?

How does the structure of DNA allow it to complete the process of replication?

Which of the four types of organic compounds serve as an energy source for cells?

What clean water regulation do you think has had the greatest impact on water quality in the United States? In a 3-5 sentences, explain and justify your opinion.