Mendel crossed a true-breeding plant with yellow peas with a true-breeding plant with green peas. All first-generation offspring had yellow peas. Using your understanding of the cause-and-effect relationship between cross-pollination and inherited traits, explain which trait is recessive.

The green color is the recessive one...

Explanation:

All the phenotypes that are observed in the first generation are yellow because it is dominant trait at genotypic level. All the F1 generation is yellow because of all the heterozygous combinations in the result of first cross. This combination may be different for other but it is same for purebred wild species.

this could be newton#'s law of cooling. the cooling curve is exponential