Competition

Active demand by two or more organisms or kinds of organisms for some environmental resource in short supply

• Habitat

• Competition

• Niche

• Population

The whole number of people or other organisms living in an area

• Habitat

• Competition

• Niche

• Population

Organisms in an ecosystem must _______ for resources.

_________ factors include water, light, and soil quality.

When two species with similar needs share a habitat with limited resources, the likely outcome is that -

• the resources will increase over time.

• the organisms will compete for the resources.

• both populations will increase.

• new populations will enter the habitat.

Competition within a population of similar animals would decrease if which of the following changes occurs in their habitat?

• The number of animals in this population increases.

• A new species of animal with similar needs is introduced.

• The population of plants these animals eat decreases.

• The area the animals are able to survive in increases.

Which of the following is NOT an example of how biotic factors interact with abiotic factors in an ecosystem?

• A lion preys on a herd of gazelle.

• Plants remove carbon dioxide from the air and add oxygen.

• Animals cause erosion by digging in the dirt.

• A lizard raises its body temperature by using heat from the Sun.

9) The Texas blind salamander lives exclusively in San Marcos, Texas. Which abiotic resource is not likely present in the Texas blind Salamander?

• Oxygen

• Sunlight

• Water

• Plants

When does competition in a population increase?

• When the resources are limited.

• When there is an increase in the population.

• When the size in habitat decreases.

• All of the above.

Which of the following factors contributes to creating competition in a group of similar organisms?

• Large habitat area

• Consistent annual rainfall

• Abundant food resources

• High population density