Answer:
The answer is 3. Double Helix.
Answer:
the first wave of extinction may be related to rapid cooling at the end of the Ordovician Period, and the second phase is widely regarded as having been caused by the sea-level fall associated with the glaciation.
The contractile vacuole expels excess fluid from the cell.
Answer:
Excess amount of Bilirubin in the blood stream.
Explanation:
When there is an excess amount of bilirubin in the blood stream, it causes jaundice, with symptoms like; yellow eyes and skin, among others.