Advances in medical technology have had no impact on the environment.

answer; ///i do believe that the correct answer is (c) hold atoms together to form compound;

they both go up but then go back down. they both end lower than they started. lastly, they both are competitive/the second on.

explanation:

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.

i think it is d. objects resist changes in their state of motion.