Answer
A
Explanation
it is the vibration and movement of the atoms and molecules within a substance. the more heat energy in a substance, the faster the molecules vibrate and move
C. Is incorrect because some cells don’t survive for more than half a century
<span>Because of semi-conservative replication in DNA synthesis, One of the strands of the new DNA molecule is original and one of the strands of the molecule is composed of new nucleic acids.</span>
Answer:
Explanation:
The troposhere is the lowest layer in the atmosphere and the largest in mass taken about 80% of the mass.
The higher the altitude in the troposphere the lower the atmospheric pressure. At the bottom of troposphere the air is very warm and it gets cool as one moves through the troposphere. The density of the air also decrease with altitude or height above the sea level and this cause the cabins of high-flying jet aircraft to be pressurized.
Answer:
Testosterone
Explanation:
This mostly happens at puberty, the LH production rises sharply that ultimtely increases the production of Testosterone by Leydig cells of testes. The secondary sexual characteristics start to appear by this sharp rise in testosterone levels.