Spontaneous mutations that occur in skin or lung cells have little effect on the evolution of a species. Why is this true?

A. Mutations in skin and lung cells lead to more serious mutations in offspring.

B. Mutations in skin and lung cells cannot be passed on to offspring.

C. Mutations in skin and lung cells are usually beneficial to the organism.

D. Mutations in skin and lung cells always lead to the death of the organism.

its d lol

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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.

propane is burned to provide the heat in many cooking grills. the chemical reaction for this process is shown in the equation below.

c3h8 + 5o2 ? 3 co2 + 4h2o + energy

what are the products in this chemical reaction?

3co2 + 4h2o + energy