The video explores ecology, focusing on how life interacts with the environment. It covers ecological levels, including populations, communities, ecosystems, biomes, and the biosphere. Key topics include energy transfer, population growth, species interactions, and the impact of abiotic factors. The video also discusses the role of keystone species and the effects of climate change on the biosphere.

What is the study of ecology primarily concerned with?

• The study of genetic variations within populations

• How life forms interact with their environment

• The chemical processes within living organisms

• The classification of different species

What term is used to describe a group of the same species living in a specific area?

• Niche

• Population

• Ecosystem

• Community

What is the carrying capacity of an environment?

• The maximum number of individuals an environment can sustain

• The total biomass an environment can support

• The number of species that can be introduced into an environment

• The maximum population size that can leave without leaving

What is a habitat?

• A large area characterized by its climate and plant life

• The nonliving components of an ecosystem

• A role a species plays in its ecosystem

• The place where an organism lives

What is the role of decomposers in an ecosystem?

• They compete for resources, ensuring biodiversity

• They break down dead material, returning nutrients to the soil

• They synthesize organic compounds from inorganic materials

• They predate on weaker species to control population

How do abiotic factors affect biotic factors in an ecosystem?

• They are consumed as food by primary producers

• They provide energy for photosynthesis

• They can greatly impact the survival and growth of organisms

• They reproduce to maintain the ecosystem balance

What is the significance of keystone species?

• They are the most abundant species in an ecosystem

• They have an unusually large impact on their ecosystem

• They are immune to natural predators

• They can live in a variety of different ecosystems

What causes coral bleaching?

• Decrease in salt concentration in the ocean

• Introduction of invasive species

• Rising ocean temperatures

• Overfishing in coral reef areas

What defines a biome?

• The living organisms within a specific area

• The global sum of all ecosystems

• A community of organisms thriving in harsh conditions

• A large area defined by its distinct climate and life forms

What is the biosphere?

• The atmosphere of Earth

• The collective name for all ecosystems

• A type of biome in tropical regions

• The layer of Earth where life exists