There are four trophic levels in a food chain: algae, salmon, bears and humans. if algae produce 6500 kj of energy, calculate the amount of energy that is passed on to each trophic level

How are the cell walls of a plant and fungus different ?

You are working in the lab and are working with the same element but with varying isotopes of the element. you are working with c-11, c-13, c-14, and c-15. what is the average atomic mass of this element? (use periodic table) a- 12 b-15 c-14 d-13

Which type of transport is responsible for oxygen entering into blood cells? a. vesicle b.passive c. facilitated d.active b.passive