Interior layer of the Sun where hot and cooler gases circulate. A:convective zone B:chromosphere C:radiative zone D:corona

Assume that a student is given two different models of bacteria, with one model consisting of big bacteria and the other consisting of small bacteria. how can the student demonstate the theory of endosymbiosis using the models

Write a paragraph at least 5 sentences “why all vaccinations should be mandatory”

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