The correct answer is B, I know this because none of the other answers are even reasonable. For example-
A is wrong because the size of elephant tusk has not changed over time, elephant tusk just grow...
C is wrong because it makes no sense to hunt elephants with no tusk :/
D is completely wrong because tusk have nothing to do with reproduction, those are two completely separate bodily functions.........
A vertebrate is an animal with a backbone.
Answer:
The energy from light causes a chemical reaction that breaks down the molecules of carbon dioxide and water and reorganizes them to make the sugar (glucose) and oxygen gas. After the sugar is produced, it is then broken down by the mitochondria into energy that can be used for growth and repair.
<span>Driving cars lowers the pH of the oceans by releasing CO that dissolves and forms acid in the oceans. The answer is letter C. CO is soluble in water that is why it readily reacts with sea water to form acid. Forming an acid in the ocean, lowers the dissolve oxygen and thus lowers the pH.</span>
