Heredity/Hereditary
<span>(the passing on of physical or mental characteristics genetically from one generation to another) Physical features mainly. </span>
Animal cells don't have chloroplasts, the food-making structure found in plant cells.
When the Moon, Earth, and Sun are lined up as seen here, the gravity of the sun plus the gravity of the moon cause two high tides and two low tides on Earth each day.
Evolution; one organism adapting to better survive new conditions.