When an organism is alive, the ratio of C-14 to C-12 ___ over time.

To learn how different organisms might be related, scientists look for similarities and differences between the organisms. On the lines below, compare a cat and a frog. What physical features are the same? What physical features are different?

What happened to the catalase molecule when exposed to high heat and acid

What state of matter is the suns chromosphere

An estuary is a partially enclosed body of water. An estuary is a mixture of what two types of water? What is primarily threatening estuaries? What is a watershed?

Which of the following incorrectly matches the term with its location? DNA is found in a chromosome. Chromosomes are found in the nucleus of a cell. Genes are located in a nucleotide. Nitrogen bases are located in the central rungs of a DNA ladder.

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.

Select the five variations of the light microscope the electron microscope the dark field microscope the phase contrast microscope the fluorescence microscope the polarizing light microscope the bright field microscope