The right choice should be A and C. Flat worm and round worm.
C. red blood cells contain hemoglobin which allows the cells to transport oxygen
<span>Chemicals are used for the communication between two cells whether the communication is from surface to surface or direct or through receptors. So the chemicals that send instructions to cells are A, T, C, and G in DNA which is four nucleotide bases called as adenine, thymine, cytosine and guanine.</span>
Answer:
They convert glucose into usable energy
Explanation:
Mitochondria contain enzymes in their structure which breaks the bonds of glucose and so releases energy with it
