Which terms complete the sentence given below?
are often keystone species because they limit the populations of species.
A. Prey A. prey
B. Predators B. predators
C. Host C. parasites

In the context of the neural impulse, which of the following is true about the depolarization of neuron membranes?

Beth’s hygrometer is reading a temperature of 30 c and a relative humidity of 65%. the humidity in the air is?

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.