Ecology 1st Semester Final Exam (Fall 2023)

All of the following characteristics would make a species more likely to become extinct EXCEPT

• Specialized niche

• Small body size

• economically valuable

• need for large habitats

What human activities have influenced recent extinction events?

• poaching

• introducing exotic species

• habitat destruction

• all answers are correct

An endangered species is a(n)

• species in danger of extinction

• species that has disappeared entirely

• plant growing on public land

• organism brought to a place where it has not lived before

All of the following are approaches to helping ecosystems recover EXCEPT

• creating artificial ecosystems

• rehabilitation

• secondary succession

• restoration

The greatest threat to most species is

• water pollution

• climate change

• parasites

• loss of habitat

Habitat fragmentation

• can create small populations that are more vulnerable

• can block migration routes

• all of these effects habitat fragmentation can have on an organism

• can create barriers that limit the ability of species to find food and mates

You are a conservation biologist and have been assigned the task of conserving an endangered species. Based on your knowledge, which of the following steps would be your first priority in protecting the species?

• introduce a species to eat the predators of the endangered species

• conserve the species' habitat

• reduce pollution in the area

• captive breeding

The sea otter is a (n) ________________ that influences the survival of many other species in its ecosystem

• keystone species

• endangered species

• essential species

• important species

Biodiversity refers to 

• nonrenewable resources

• the rate of species decline

• extinct species

• the variety of species on Earth

When animals are placed in controlled or restrictive environments, they

• may have difficulty meeting their basic survival needs

• have low rates of genetic disorders because inbreeding does not happen

• become immune to infection diseases

• are less likely to compete