1) All of the following are problems after hurricanes EXCEPT

turbulence

colder water

less sunlight

mild currents

2) Symbiotic relationships always benefit both species.

True

False

3)The variations in the lemming population illustrate

the impact that population cycles have on predators

the ways in which a lack of food drives species to extinction

the benefits that generalist predators have over specific predators

how land animals have different population cycles than marine creature

How do tides affect the organisms living in intertidal zones? a. no organisms live in intertidal zones due to the tumultuous environment. b. the mechanical forces of the waves keeps the organisms clean. c. only plants live in intertidal zones because the animals float away with the waves and never return. d. the mechanical forces of the waves can dislodge the organisms from their habitat.

African penguins, which inhabit the coasts of southern africa, were classified as an endangered species in 2010. two significant threats to their survival are ecosystem damage from oil spills and overfishing by humans. overfishing depletes the food supply of african penguins. the best method to reduce the threat of overfishing would be to . the risk of oil spills could be reduced by increasing the use of , which should oil consumption. if an oil spill does occur, could be used to remove the oil so the ecosystem may more quickly recover.

What are examples of the plant life and animal life that can be found in each type of terrarium