1. why were asian carp introduced in the united states?
a. to clean tanks in fisheries
b. to improve sport fishing in lakes
c. to provide a food source in some areas
d. they migrated to the united states in their own

2.how long did it take to stop the flow of oil from the deepwater horizon incident ?
a. 2 days
b.29 days
c. 53 days
d. 87 days

3. some kinds of algae prodice toxins
a. true
b. false

4. a non-renewable resource can always be replaced with a sythetic version
a. true
b. false

5. how many small pieces of trash are estimated to be in each square mile of the great pacific garbage patch?
a. 1 million
b. 8.3 million
c. 1.9 million
d. 6.2 million

What protects the lining of the stomach from acidic gastric juices?

Qué sucede cuando una persona tiene muy poco o demasiado costeroides?

Monarch butterflies have brightly colored orange wings with black patterns on them, making them easily visible to birds that eat butterflies and moths, yet birds rarely eat the monarchs. likewise, the monarch caterpillars are brightly striped yellow and white and black, and they also are rarely eaten by birds, although some wasps will attack them and feed them to their young. what can be inferred from these observations? monarchs must threaten and attack birds, but not wasps. monarchs have a way of discouraging bird predation that does not involve hiding. monarchs’ wings are so colorful that most birds must find them difficult to eat. monarchs lay more eggs than other less conspicuous butterflies.