B. is the correct answer. through mutation and sexual reproduction
Answer:
One sample should have had no enzyme and acted as a control.
The answer would be D all of the above
Your cardiovascular system is what moves blood through your body, delivering oxygen, nutrients, and more to its many cells. Those veins and arteries keep you alive. In your home, there are pipes that deliver water to different rooms of the house, helping you stay clean and hydrated.