The scientist designed an experiment to determine whether reaction rate of an enzyme- catalyzed reaction is proportional to the enzyme concentration. The table shows the detail of the experimental set up. What does the experiment lack validity?

a. the production of carbon dioxide through the process of photosynthesis

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.

answeramino acids;

the correct answers are;

a. the rock was made from more than one type of material.

e. layers of hot liquids in the rock cooled and solidified at different temperatures.

these are the two options that are related to the statement given above.