Aprotostar is a. a region of space from which light cannot escape b. a small star that will continue as a main sequence star for hundreds of billions of years c. a star with a core of neutrons d. the stage after a star completes its main sequence existence e. the stage before a star becomes a main sequence star

Match the examples to the correct level of organization. 1. system level roses, snakes, puppies 2. organism level roots, stamens, leaves 3. tissue level bone, cartilage, blood 4. organ level heart, veins, arteries

Cattle with brown fur and cattle with white fur will produce a reddish roan calf . when examined closely, the calf show about an even number of brown hairs and white hairs that give a reddish appearance when viewed from far away. the fact that both the brown fur allele and the white fur allele are expressed equally in the offspring is an example of

Which feature of a human community is similar to a niche in a biological community