One type of symbiosis is called mutualism. Which of the following is an example of mutualism? mangrove trees in swamps with long roots provide habitat for small fish which provide "fertilizer" to support the trees
lions hunt zebras and keep them from overgrazing the savanna
fleas bite dogs and other mammals, obtaining blood
birds ride on the back of wildebeest, eating the bugs that the wildebeest disturbs as it walks

Which beat describes the brain stem

Select the correct answer. which term do biologists use to describe the average number of individuals of a species per unit area? a. carrying capacity b. population density c. minimal viable population d. survivability curve

Astore manager timed janette to see how long it would take her to fold and put away a sweater, a shirt, a pair of pants, and a scarf. it took her 26.1 seconds for the shirt, 24.3 seconds for the sweater, 32.8 seconds for the pants, and 18.2 seconds for the scarf. what was the average time it took janette to fold and put away all four items? during a catered lunch, an average of 4 cups of tea are poured per minute. the lunch will last 2 hours. how many gallons of tea should the caterer bring if there are 16 cups in one gallon?