Which statement is the best description of respiration?A. Respiration is the same thing as inhaling and exhaling oxygen. B. Respiration is the process of breathing in oxygen through the lungs. C. Respiration is the exchange of oxygen and carbon dioxide in the alveoli. D. Respiration includes inhaling, exhaling, and reactions in cells using oxygen.

Compare asexual reproduction to sexual reproduction

25) a student takes four samples of a white crystalline solid and places each in a well plate. on top of each sample, she carefully places 20 drops of clear mystery liquids a, b, c and d. her results for each well are: liquid a: the solid dissolves quickly. liquid b: the solid appears unchanged. liquid c: a brownish colored liquid is produced. liquid d: fizzing occurs and the well becomes warmer. in which well does a physical change occur?

Which of these is not a nucleotide base found in dna?