Why is it a good idea to substitute transitions for visual elements in a text?

What gases are carried by the blood

Which base is found only in rna? ribose othymine ouracil o deoxyribose detecteet

4. only about 10 percent of the energy in an organism is passed on to the next level of a food chain. look at this food chain: grass → rabbit → hawk what percentage of the energy stored by the grass is passed on to the hawk?