Exam 5: Biodiversity, Species Interactions, and Population Control

The gradual change in species composition in a given area is called ____________________.

The most common interaction between species is commensalism.

Emigration is the ____.

The southern sea otter has been classified as a(n)____________________ species because in their absence, kelp forests would probably be destroyed.

____________________ is a competitive interaction between species for food, water, light and/or space.

The capacity to withstand external stress and disturbance is called ____.

Which of the following exhibits primary succession?

Organisms with clumped distributions are fairly rare.

What is the most common interaction between species?

What is said to occur when one organism feeds on another organism by living on or in the other organism?

Bats prey on certain species of moths by using high frequency echolocation to locate their prey. Certain moths have evolved ears that can hear these frequencies allowing them to escape. This is an example of ____.

Bad-tasting, bad-smelling, toxic, or stinging-prey species advertise their characteristics using ____________________.

A population increases through birth and ____.

Vast armies of ____________________ inhabit the digestive tracts of animals, such as humans, and help break down or digest their food.

Large mammals, such as elephants and rhinoceroses, are especially vulnerable to extinction because of their reproductive patterns.

In communities and ecosystems the types and numbers of species change in response to changing environmental conditions.

____________________ occurs when a member of one species feeds directly on all or part of a member of another species.

At the present time the global human population surpasses seven billion people. If we exceed the carrying capacity of the earth, the human population may suffer a substantial collapse. Consider the following formula for population change: population change = (births + immigration)− (deaths + emigration)What will be required of humans in order to stabilize or reduce our population?

One of the factors determining the rate of succession is _______________, in which one set of species makes an area suitable for other species with different requirements.

Species can, over a long period of time, develop adaptations that allow them to reduce or avoid competition by sharing resources. This is called ____.