What are some changes that can occur in ecosystems?

Which plant has a visible leaf modification that will it conserve water in extremely dry environments?

What is the genotype for the following phenoytpe: a male fruit fly that is heterozygous for eye color and homozygous dominant for wing size. a eeww b eeww c eeww d wewe

What the theory that the sun goes around earth was replaced with the theory that earth goes around the sun this was an exaple of a