uracil
Explanation:
because the rest are part of the DNA strand
Answer:
cosmic background radiation
Explanation:
hope this helps!!
Answer:
D
Explanation: Decomposers are like grinders, they break down dead animals and plants.
Allan already had a heart attack and can try to prevent another one by changing the diet, exercising, or even quit smoking, but there are non-modifiable risks such as age, sex and generic heritage, so If Allan is over 40 years old, male or comes from a family with heart diseases, Allan needs to be extra careful because those factors cannot be changed no matter how the way of life is changed.