Life Science Final Review

What is a population?

• A group of individuals of different species living in a specific area.

• A group of individuals of the same species living in a specific area.

• A collection of organisms that cannot interbreed.

• A random assortment of animals in a zoo.

Watson and Crick built a DNA model like a

• Long, twisted ladder.

• Straight, flat ribbon.

• Circular, coiled structure.

• Short, straight line.

What is a single dolphin an example of?

• Group

• Species

• Individual

• Pod

What is a community in ecological terms?

• A group of individuals of the same species living in an area.

• All the different populations that live together in an area.

• A specific area where organisms interact with their environment.

• A collection of ecosystems in a geographical region.

What is the definition of an ecosystem?

• A community of living organisms and their interactions with their environment.

• A collection of non-living things in a specific area.

• A group of similar species living together.

• A process of energy transfer between organisms.

What is the nitrogen cycle?

• The process by which nitrogen is converted between its various chemical forms.

• A method for measuring nitrogen levels in soil.

• The cycle of nitrogen in the atmosphere only.

• A process that only occurs in aquatic environments.

What is the role of producers in an ecosystem?

• They create energy through photosynthesis.

• They consume energy from other organisms.

• They decompose organic matter.

• They regulate the population of consumers.

What are the four necessities of life?

• Food, water, air, and shelter.

• Clothing, entertainment, education, and food.

• Air, shelter, transportation, and clothing.

• Water, food, technology, and shelter.

What is the definition of a habitat?

• The natural home or environment of an organism.

• A type of animal that lives in the ocean.

• A place where plants grow without sunlight.

• A man-made structure for housing animals.

What is the importance of biodiversity?

• It enhances ecosystem productivity and stability.

• It reduces the number of species in an ecosystem.

• It increases the risk of extinction for species.

• It has no significant impact on the environment.