Chapter 6 Test Review

Front

What is the competitive exclusion principle?

Back

When two species compete for the same niche in a habitat, eventually one of them will win and the other will die out. If species hold separate niches, they can coexist within the habitat.

Front

What is a keystone species?

Back

A species that has a disproportionately large effect on its environment relative to its abundance, helping to maintain the structure of an ecological community.

Front

How does clear-cutting affect biodiversity?

Back

Clear-cutting can reduce biodiversity by destroying habitats and eliminating species that rely on those habitats.

Front

What is biodiversity?

Back

The variety of life in the world or in a particular habitat or ecosystem, including the diversity of species, genetic diversity, and ecosystem diversity.

Front

What is genetic diversity?

Back

The total number of genetic characteristics in the genetic makeup of a species, which allows for adaptation to changing environments.

Front

What is the role of predators in an ecosystem?

Back

Predators help control the population of prey species, which can prevent overgrazing and promote a balanced ecosystem.

Front

What is the significance of transferring genes from wild plants to crops?

Back

It can improve genetic diversity and resilience of crops, potentially leading to better yields and resistance to diseases.

Front

What are the consequences of reduced biodiversity in agriculture?

Back

Reduced biodiversity can lead to increased vulnerability to pests and diseases, decreased resilience to environmental changes, and lower crop yields.

Front

What is the relationship between societal needs and environmental preservation?

Back

Societal needs can support arguments for preservation, as natural resources may provide solutions for medicine, food, and other human needs.

Front

What is an ecological niche?

Back

The role and position a species has in its environment, including all interactions with biotic and abiotic factors.