How do fat cells respond to the body's increased demand for energy during prolonged exercise?

One of the reasons that stars are so large is because

Do plants make food in their stems flowers roots or leaves?

When one dna molecule is copied to make two dna molecules, the new dna contains a) 25% of the parent dna. b) 50% of the parent dna. c) 75% of the parent dna. d) 100% of the parent dna. e) none of the parent dna.