competition and interdependence

• What should you be able to describe by the end of the video?

  The levels of organization in an ecosystem and the concepts of competition and interdependence
• What is meant by the term 'habitat'?

  The environment in which an organism lives
• What is the habitat of elephants mentioned in the video?

  The grasslands of Africa
• What is a population in ecological terms?

  The total number of organisms of the same species living in the same geographical area
• What term do scientists use to describe a group of elephants living in the grasslands?

  A population
• What is a community in an ecosystem?

  The populations of all the different species that live in the same habitat
• What does the term 'biotic' refer to?

  The living part of the environment
• What are abiotic factors in an ecosystem?

  The nonliving parts of an environment, such as water and minerals in the soil
• How is an ecosystem defined?

  Both the biotic and abiotic parts of an environment and how they interact
• What do living organisms require from their surroundings?

  A supply of materials, such as water
• Why do living organisms have to compete with each other?

  Because resources are often in short supply
• What resources do plants compete for?

  Light, space, water, and mineral ions in the soil
• What resources do animals compete for?

  Food, water, mating partners, and territory
• What does interdependence mean in an ecological context?

  All of the different species in a community depend on each other
• How do lions and zebras demonstrate interdependence?

  Lions eat zebras, and zebras depend on plants for food
• What role do bees play in the ecosystem?

  They help pollinate plants
• What happens if a species disappears from a community?

  It can affect the whole community, leading to food shortages for other species
• What is a stable community?

  A community where the populations of different species remain fairly constant
• What does it mean for populations to be in balance in a stable community?

  Populations of organisms are balanced with each other and with abiotic resources
• What type of questions can you expect in the exam regarding this topic?

  Questions on competition and interdependence
• What are the key definitions related to ecosystems that you should learn?

  • Habitat: The environment in which an organism lives
  • Population: Total number of organisms of the same species in a geographical area
  • Community: Populations of all different species in the same habitat
  • Biotic: Living parts of the environment
  • Abiotic: Nonliving parts of the environment
  • Ecosystem: Both biotic and abiotic parts of an environment and their interactions