Environmental Science Final Sem 1

Front

What are resources in an ecosystem?

Back

Resources are essential elements that organisms need to survive, such as food, water, shelter, and mates.

Front

What is mutation in the context of evolution?

Back

Mutation is an accidental change in DNA that can lead to new traits in organisms, contributing to the process of evolution.

Front

What are limiting factors in an ecosystem?

Back

Limiting factors are resources that are in short supply and restrict the growth, abundance, or distribution of organisms, such as food, water, and space.

Front

Which type of organisms are most abundant in an ecosystem?

Back

Producers are the most abundant organisms in an ecosystem, as they convert sunlight into energy through photosynthesis.

Front

What are autotrophs?

Back

Autotrophs are organisms that produce their own food, primarily through photosynthesis, and include primary producers like plants.

Front

Define the term 'ecosystem'.

Back

An ecosystem is a community of living organisms interacting with their physical environment, including both biotic and abiotic components.

Front

What role do decomposers play in an ecosystem?

Back

Decomposers break down dead organic matter, recycling nutrients back into the ecosystem and supporting the growth of producers.

Front

Explain the concept of natural selection.

Back

Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring.

Front

What is genetic drift?

Back

Genetic drift is a mechanism of evolution that involves random changes in allele frequencies within a population, often having a more significant effect in small populations.

Front

What is the difference between herbivores, carnivores, and omnivores?

Back

Herbivores eat plants, carnivores eat animals, and omnivores consume both plants and animals.