Chemical reactions convert __ [ Select ] __ to __ [ Select ] . In nonliving systems, the presence of a(n) __ [ Select ] allows the reaction to proceed very quickly and have a lower __ [ Select ] . In living systems, this function is carried out by proteins called __ [ Select ] .Chemical reactions convert __ [ Select ] __ to __ [ Select ] . In nonliving systems, the presence of a(n) __ [ Select ] allows the reaction to proceed very quickly and have a lower __ [ Select ] . In living systems, this function is carried out by proteins called __ [ Select ] .

1. Reactants to products

2. Catalyst

3. Activation energy

4. Enzymes

Explanation:

Chemical reactions involve the formation of substances called PRODUCTS from other substances called REACTANTS. The addition of certain substances called CATALYSTS to chemical reactions occuring outside living environment helps to spedeen up the chemical reaction by LOWERING ITS ACTIVATION ENERGY, which is the energy required to start the reaction.

However, within a living environment, molecules which act as catalyst called ENZYMES perform the same function of making reaction to proceed very quickly. Please find the answers to the omitted spaces in BOLD.

Chemical reactions convert [REACTANTS] to [PRODUCTS]. In nonliving systems, the presence of a(n) [CATALYST] allows the reaction to proceed very quickly and have a lower [ACTIVATION ENERGY]. In living systems, this function is carried out by proteins calledH [ENZYMES].

step 1 ammonium can be absorbed by plants, but some is converted into nitrates which are better for plants to absorb. this is called nitrification. 2. step 2 the deer eats the plants and uses the nitrogen-containing proteins for cell growth. 3. step 3 bacteria in the soil conduct nitrogen fixation to convert nitrogen gas from the atmosphere into ammonium. 4. step 4 some of the nitrates are absorbed back into plants, but denitrification breaks down the nitrates into nitrogen gas released back into the atmosphere. 5. step 5 nitrogen is found in the urine, which gets broken down into ammonium through the process of ammonification. 6. step 6 plants absorb the ammonium and begin assimilation, the process to add the nitrogen to protein.

answer: that would be cheating

explanation: