At the zoo, Anya observes that individuals of a certain kangaroo species have slightly different sizes and colors. What characteristic of populations is Anya observing? O adaptation
O evolution
O selection
O variation

Long-period comets come from the oort cloud particles in earth’s atmosphere material from the asteroid belt the kuiper belt

How does photosynthesis show the conservation of mass and energy?

Graded assignment lab report answer the questions below. which combinations of substances resulted in a chemical change? for each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. make a general statement about the reactivity of the metals in this experiment.