The evolution of which characteristic allowed for the development and enlargement of complex internal organs? a. segmentation b. tissue c. body cavity d. exoskeleton

Why was the sample heated in step 5? describe the chemical principles involved in the reasoning behind this step?

~~16. while watching a special on animals, brianna discovers that hares tend to lose heat through their ears. based on this and what is known about surface-to-volume ratios, propose an explanation as to why hares that live in hot climates (such as the desert) have large, extended ears

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important