You obtain the pigments called carotenoids in your diet when you eat carrots. Why do carotenoids appear yellow and orange?

How can a geological time scale best be reconstructed? a) comparing vestigial structures in living species b) comparing homologous structures in living species c) examining homologous structures in fossil remains d) examining the written records of scientists from past cultures

Land conservation is a worldwide priority. there are several methods to prevent the loss of land due to a variety of reasons. which method is not a way to conserve land? a) sea walls b) rainwater harvesting c) limits on clear cuts of forests d) cut and burn methods of clearing land

How does the color of light affect the germination time (amount time a plant takes to develop) of a radish seed?