Most organisms carry out cellular respiration. Which of the following best describes cellular respiration? A. a process in which organisms release oxygen to the air
B. a chemical process in which cells use light energy to make food
C. a mechanical process in which humans take in oxygen from the air
D. a chemical process in which cells use oxygen to release energy from food

How did the research presented in the article affect scientists' understanding of the evolution of eukaryotes

Sediment layers stop lateral spreading when: they encounter a barrier they encounter an opposing current they run out of additional sedimentary material

Step 1 review the imaginary strand of dna below. note the complementary base pairs. a g c a a t c c g t c t t g g t c g t t a g g c a g a a c c step 2 to begin replicating this strand of dna, draw the two sides of the strand separating. step 3 now, draw the free-floating bases linking up with the separate sides. remember to follow the rules of complementary base pairing. step 4 draw the two resulting dna strands.