Mr. Miller has assigned his science class the task of making a dichotomous key. The students must classify a chart of dogs. Which characteristic difference visible in the chart would be the best start for the dichotomous key?

Answer quickly please!!! (Will put brainliest for the correct answer)

the offspring would all be white. if the parents are both white flowers then they have the genotype rr, which when crossed results in an all white punnet square.

that is wrong, its not thymus.

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.