2 or more different atoms are combined in definite proportions in any compound.
Answer:
mutation
Explanation:
If any part of the DNA is changed, such as the base pairs, then it would result in the mutation of the DNA, causing it to carry out a different function
B The layer that is the youngest is the top most layer of the rock.
Answer:
Explanation:
The perception of cold begins when nerves in the skin send impulses to the brain about skin temperature. These impulses respond not only to the temperature of the skin, but also to the rate of change in skin temperature. Nervous impulses sent to muscles generate extra metabolic heat through shivering.