Populations and Ecosystems

What is an ecosystem?

• An ecosystem is a single organism living in a specific environment

• An ecosystem is a man-made structure for preserving wildlife

• An ecosystem is a term used to describe the study of rocks and minerals

• An ecosystem is a community of living organisms in conjunction with the nonliving components of their environment, interacting as a system.

Name three different types of habitats.

• mountain

• forest

• Terrestrial, aquatic, aerial

• Desert

Explain the difference between a population and a community in an ecosystem.

• A population is a group of organisms in a specific area, while a community is a group of organisms in different areas

• A population and a community are the same thing

• A population consists of individuals of different species, while a community consists of populations of the same species

• The difference between a population and a community is that a population consists of individuals of the same species, while a community consists of populations of different species interacting in the same area.

How do abiotic factors affect the population of organisms in an ecosystem?

• Abiotic factors only affect the physical environment, not the organisms

• Abiotic factors have no impact on the population of organisms in an ecosystem

• Abiotic factors can directly impact the survival, growth, and reproduction of organisms in an ecosystem.

• Organisms can adapt to any changes in abiotic factors, so they have no effect on population

What is the role of a keystone species in an ecosystem?

• The role of a keystone species in an ecosystem is to have no impact on the diversity and balance of the ecosystem

• The role of a keystone species in an ecosystem is to be the least important species in the ecosystem

• The role of a keystone species in an ecosystem is to only benefit its own population

• The role of a keystone species in an ecosystem is to have a significant influence on the diversity and balance of the ecosystem, often by regulating the population of other species or by providing key resources.

Describe the process of succession in an ecosystem.

• Succession in an ecosystem is a rapid process that occurs within a few days

• The process of succession in an ecosystem involves the gradual replacement of one community by another, starting from pioneer species and leading to a stable climax community.

• Succession in an ecosystem involves the simultaneous growth of all species in the community

• Succession in an ecosystem does not involve any competition between different species

How do human activities impact the population of organisms in an ecosystem?

• Human activities have no impact on the population of organisms in an ecosystem

• Human activities always benefit the population of organisms in an ecosystem

• Human activities can negatively impact the population of organisms in an ecosystem by disrupting their habitats, reducing their food sources, and introducing pollutants.

• Human activities only impact the population of organisms in a positive way

What are some examples of adaptations that help organisms survive in their habitats?

• Playing dead

• Wearing bright colors

• Camouflage, mimicry, hibernation, migration, and physical features like sharp claws or strong beaks.

• Loud vocalization

Explain the concept of carrying capacity in an ecosystem.

• Carrying capacity only applies to plants and not animals in an ecosystem.

• Carrying capacity refers to the minimum population size of a species that the ecosystem can sustain indefinitely.

• Carrying capacity in an ecosystem refers to the maximum population size of a species that the ecosystem can sustain indefinitely.

• Carrying capacity is the average population size of a species in an ecosystem.

How do changes in the environment affect the population of organisms in an ecosystem?

• Population size remains constant regardless of changes in the environment

• Changes in the environment can lead to fluctuations in population size, with some species thriving and others declining or even becoming extinct.

• Changes in the environment have no impact on the population of organisms

• Organisms in an ecosystem are not affected by changes in the environment