Answer:
Check if the rock layer has fossils in it.
Explanation:
The rock layer from the inside out and the fossils will tell you how old the rock is.
This is false. There are elements that have three letters, however they don't occur as often as those with one or two letter formulas.
A. A gamete carries to genes for a trait.
B. A gamete carries one allele for a gene.
C. A gamete can carry multiple alleles for a trait.
D. Some gametes are dominant and some are recessive.
The spinal cord is the primary means for transmitting messages between the brain and the rest of the body.