1. bioaccumulation makes substance particularly dangerous because ?
a. they are processed in the digestive system
b. they will break down in environments over time
c. they will remain in the organism that consume them
d. it is a problem for those at the lowest levels of the food pyramid

2. which of the following bioaccumulates?

a. oil

b. oxygen

c. mercury

d. all toxins

3. the right whale is an example of ?

a. a species that is recovering from being endangered

b. a species that failed to adapt to changes to its environment

c. a species that is almost gone because of the excessive pollution in its habitat

d. a species that has become too populous and threatens he survival other of species

4.which of the following puts the most oil into ocean waters?
a. ballast water
b. leaking oil tankers
c. runoff from cars and trucks

d. accidents similar to the deepwater horizon accident

5. how many american states have waters that are so polluted the seafood from them is not safe to eat?

a.10

b.19

c.37

d.50

6. the problem with oil was noticed immediately after the deepwater horizon accident ?

a. true

b. false

7. in the deepwater horizon incident, the oil that entered the ecosystem came from ?
a. a tanker ship

b. the drilling platform

c. an underwater earthquake

d. underneath the ocean floor