Exam 29: Habitat Loss, biodiversity, and Conservation

The area of suitable habitat necessary for maintaining the number of individuals and ensuring the long-term survival of a species should be highest for a

Chestnut blight and Dutch elm disease have been caused by specific types of ________ organisms.

Species living on isolated islands are especially vulnerable to extinction by

The number of individuals necessary to ensure the long-term survival of a species is called the minimum ________ population.

Small species of mammals are more vulnerable to extinction than are large species of mammals.

The mass extinction of dinosaurs and other animals at the end of the Cretaceous period is believed by most scientists to have been caused by massive volcanic activity causing an ice age.

The home range of a carnivore is usually larger than that of a herbivore of the same size.

Clearing of tropical dry forests has been primarily for

The mass extinction of dinosaurs and other animals at the end of the Cretaceous period is believed by most scientists to have been caused by

Conservationists often attempt to restore a locally extinct population of a species through ________ into the wild of individuals from captive-bred populations.

The establishment of habitat corridors between protected areas may have some negative consequences.

According to the IUCN,if a species has at least a 10% probability of extinction within the next century,it is classified as

A species with a 20% or greater probability of extinction within 20 years or five generations,whichever is longer,is considered to be a(n)________ species.

Which of the following is not an advantage for preserving a large reserve rather than a small reserve?

Degraded habitats cannot be restored even close to their original condition.

How many biodiversity hotspots in the world are officially designated by the IUCN?

Designation of a region as a(n)________ is based on its supporting 1500 or more endemic species of plants and more than 70% of the original habitat lost.

A species that migrates seasonally is more vulnerable to extinction than a sedentary species that does not migrate.

Invasive plant species often outcompete native plants for resources.

Loss of a very large number of species in a relatively short time is called a(n)________ extinction event.