The total amount of organic matter present in any trophic level is called

Inside a prokaryote such as e. coli, an opera on controls for the production of the amino acid tryptophan. what occurs in the cell in order to turn off the production of tryptophan.

If a subtance cannot be broken down chemically into a simpler subtance, what is it? an element an atom a compound a molecule

How are atoms and electrons related

Which process is most likely involved in the change in red blood cell volume?

Chemical reactions improving concentration and focus is my goal i think that hormoans can open nuero path ways improving thinking and mood and well ... everything

Describe how viruses and bacteria can be used as biological weapons. What are some of the potential threats and potential benefits? Do you agree with the use of viruses and bacteria as biological weapons? Why or why not?

Because humans are diploid organisms, their body celle contain

How many years do stars live for?

What does not move accross axons? a) neither electrons nor ions b) electrons c) ions and electrons d) ions

Engaging in regular physical activity and reducing sedentary activities can: A. Promote health B. Enhance psychological well-being C. Promote a healthy body weight D. All of the above