Scientists in Chicago measure the amount of oxygen and carbon dioxide in Lake Michigan. This helps them determine the health of the lake ecosystem. In July, scientists noticed a large decrease in oxygen levels in the lake. The decrease in oxygen could be due to: a) A decrease in fish populations.
b) A decrease in plant growth.
c) An increase in plant growth.
d) An increase in rain water supplied to the lake.

what have scientists found to be the most efficient and effective way to insert new sequences into an individual? a-scientists have created genetically altered foods that release dna during digestion. b-scientists use viruses to insert specific gene sequences. c-scientists irradiate genes so that they can be absorbed through the skin.

we need additional information in order to determine the cause of death for anna garcia. there are at least 3 things with explanation included as to why we need them are as follows: