Bio 142 Exam 1

Question 1

Universe begins how many years ago?

Answer 1

13.7 Billion Years Ago

Question 2

Earth forms when?

Answer 2

4.55 Billion Years Ago

Question 3

When does life begin on Earth?

Answer 3

between 4 billion and 3.5 billion years ago

Question 4

Prebiotic soup model?

Answer 4

Complex organic molecules

formed from gases in the atmosphere, and then fell into oceans

Question 5

Surface metabolism model?

Answer 5

Complex organic
molecules formed when dissolved gases came into
contact with minerals in deep sea vents