What is biological diversity?

The variety of life in all its forms and levels
The process of photosynthesis in plants
The survival of the fittest organisms only
The balance of gases in the atmosphere

Which of the following best describes genetic diversity?

Differences in DNA within a species
The number of ecosystems on Earth
The variety of habitats in a biome
The amount of energy in a food chain

An ecosystem with many different species is considered to have high _____.

Biodiversity
Climate
Competition
Predation

Which process leads to the survival of organisms best adapted to their environment?

Natural selection
Extinction
Migration
Hybridization

Which of these is an example of structural adaptation?

The migration of birds
Nocturnal hunting by owls
Photosynthesis in plants

Why is maintaining biodiversity important for ecosystems?

It ensures stability and resilience of ecosystems
It reduces the number of organisms
It makes ecosystems dependent on one species
It removes competition from the ecosystem

Selective breeding in agriculture reduces which type of diversity?

Genetic diversity
Species diversity
Ecosystem diversity
Cultural diversity

Which term refers to species that are at risk of disappearing from Earth?

Endangered species
Invasive species
Native species
Domesticated species