The processes of photosynthesis and cellular respiration are complementary. during these energy conversions, some energy is
a) lost in the form of heat.
b) created in the form of heat.
c) used to create light.
d) destroyed when the chemical bonds of glucose are made.
e) saved in the chemical bonds of water, co2 and o2.

What links the two strands in a dna helix together in the middle? a. phosphate groups b. sugar rings bonded together c. proteins d. bases with hydrogen bonds

Students in biology are studying the macromolecules of life. they used a calorimeter to determine the calories in various types of food. once the lab was completed, the students ate the left over food samples. monica commented that in just 6 or 7 "chews" of the saltine, it was gone; nothing but a sticky paste in her mouth. elaborate on what happened chemically while chewing the saltine. include the macromolecules present.

Common symptoms of an iron-defiency anemia include muscle weakness shortness of breath and lightheadedness why does iron deficiency causes these symptoms