The source of the oxygen produced by photosynthesis has been identified through experiments using radioactive tracers. the oxygen comes from

Why do chromosomes condense at the start of mitosis?

explain how the salinity (salt concentration) of an estuary affect the kind of organism that live there?

Often the growth cycle of one population has an effect on the cycle of another. As moose populations increase, wolf populations also increase.

Why is the fusion reaction not currently used to produce energy, especially as it is a "clean" form of energy that does not create radioactive or nuclear byproducts? A - There are currently not enough fuels for fusion reactions.

Why is weeding flower beds so imprortant?

Question 2 What is the difference between a non-mutated gene and a mutated gene? The sequence of DNA bases is different. The sequence of DNA bases has been removed. Adenine pairs with guanine or cytosine; guanine pairs with adenine or thymine.

After recording the damage encountered in a load, what should be done with the damaged cases?

Radioactive decay occurs when atoms: A. lose mass B. join with atoms of another element C. break down the form atoms of another element D. are exposed to another element

In the digestive system what part of the body precedes the small intestine?

The difference between mitosis and meiosis