Which of the following agricultural products requires the least amount of energy? beef cattle
dairy cows
wheat
both (a) and (b)

Milk production during breastfeeding is increased by the suckling of a newborn from his mother's nipple. this type of feedback mechanism best describes a positive or negative

If it turned out dinosaurs were colorblind, how would this affect some assumptions scientists have made about them?

As a review, define the terms autotroph and heterotroph. keep in mind that plants have mitochondria and chloroplasts and do both cellular respiration and photosynthesis!