I'd say B for it to "B" right :D
The molecular clock tracks down nucleotide sequences for DNA or amino acids that contain sequences of proteins. Scientists use this to deduce the time in history where life forms possibly have diverged. This technique is also known as a gene clock or an evolutionary clock.
Answer:
The kidneys can adjust the concentration of the urine to reflect the body’s water needs, conserving water if the body is dehydrated or making urine more dilute to expel excess water when necessary. ADH is a hormone that helps the body to retain water by increasing water reabsorption by the kidneys.
Answer:
The symbol for D in Brenda's diagram most likely represent the sun.
Reason:
A represents the Universe, B represents the Solar System, C represents the Earth and D represents the Sun
