ANSWER PLS!! Animal cells do not contain chloroplasts. What does this indicate about how animals must get the sugars they need to produce chemical energy that their cells can use?

Consider the model of the oxygen cycle on earth. the majority of earth's oxygen reservoirs are found in the a) atmosphere. b) biosphere. c) hydrosphere. d) lithosphere.

Imagine you are introducing the lac operan and the trp operon to students who have never learned about it before. complete the table to compare the similarities and differences between the two operons

Hemoglobin is a proton that carries oxygen around the body what is hemoglobin made from