Which of the following explains why using locally-produced resources (as opposed to those produced a great distance away) can be considered a form of conservation?
a)
transporting resources consumes additional resources.
b)
using local resources reduces the requirement for transport.
c)
buying local with tax revenue.
d)
both a and b.

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.

answer; the male's sperm cells have mitochondria, but because the sperm contributes dna but no cytoplasm, no mitochondria are passed to the egg at ferilization;