ecology unit III quiz

A type of species interaction where one of the individuals is positively affected to the detriment of the other is known as what?

		Amensalism
		Commensalism
		Mutualism
		Parasitism

Penicillium (the source of the antibiotic penicillin) is a mold that secretes a toxin that kills bacteria and other organisms. Penicillium, however, is not harmed by this toxin. This is an example of:

		predator-prey.
		commensalism.
		mutualism.
		amensalism

The yucca moth interacts with the soapweed yucca in which way?

		The moth pollinates the flowers so the larvae can eat the seeds.
		The plant provides shelter for adults.
		The moth larvae feed on the roots of the plant.
		The yucca secretes chemicals that kill the moth.

Vultures feed largely on carrion (dead animals). Their role in the ecosystem is largely as that of a ___________.

		predator
		true predator
		scavenger
		parasite

Harvesting timber in such a way that only select trees are cut and the population of those trees within the targeted forest is allowed to return to the carrying capacity is an example of ___________.

		give-and-take strategy
		yield
		sustainable yield
		over-harvesting

A ____________allows humans to harvest resources but allows the population of prey to rebound to a level close to that of the carrying capacity of the ecosystem in which those populations live.

		total yield
		minimum yield
		sustainable yield
		harvestable yield