Which part of the plant allows gases such as carbon dioxide into a plant leaf for photosynthesis?

check for the pregnancy rating of drug. if its class c or d see if other alternatives

name and explain one of the event that occurs during meiosis that increases the variation in offspring even more than simple reproduction?

b is the correct answer

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.