Iqwst ls1 review

What nutrient builds, maintains, and repairs body tissues and cells?

• Carbohydrates

• Fats

• Vitamins

• Protein

What role do decomposers play in an ecosystem?

• They produce energy through photosynthesis.

• They break down dead organisms and recycle nutrients back into the environment.

• They compete with plants for sunlight and nutrients.

• They provide shelter for various organisms.

What is a producer in an ecosystem?

• An organism that gets its energy by using the sun to make its own energy.

• An organism that consumes other organisms for energy.

• An organism that decomposes dead matter for nutrients.

• An organism that relies on chemical reactions for energy.

What is an ecosystem?

• A community of living organisms interacting with their physical environment.

• A type of biome characterized by its climate and geography.

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

• A group of species that share the same habitat.

What is biomagnification?

• The increase in concentration of toxins in organisms at each successive level of the food chain.

• The process by which organisms adapt to their environment over time.

• The reduction of biodiversity in an ecosystem due to pollution.

• The transfer of energy from one trophic level to another.

What is the difference between a food chain and a food web?

• A food chain is a linear sequence of organisms, while a food web is a complex network of interconnected food chains.

• A food chain includes all organisms in an ecosystem, while a food web only includes predators.

• A food chain is a complex network of interconnected food webs, while a food web is a simple linear sequence.

• A food chain represents only herbivores, while a food web includes both herbivores and carnivores.

What is the importance of water in an ecosystem?

• Water is essential for all living organisms and plays a key role in nutrient transport and chemical reactions.

• Water is primarily used for recreational activities and has little impact on ecosystems.

• Water is only important for aquatic organisms and not for terrestrial life.

• Water serves as a barrier to prevent the spread of diseases in ecosystems.

What happens if a disease affects a population of primary consumers?

• It can lead to a decrease in the population of secondary consumers that rely on them for food.

• It will have no effect on the population of secondary consumers.

• It will increase the population of secondary consumers due to less competition.

• It will cause primary consumers to migrate to other areas.

What is the impact of pollution on ecosystems?

• Pollution can enhance biodiversity and promote healthy ecosystems.

• Pollution can harm organisms, disrupt food chains, and lead to loss of biodiversity.

• Pollution has no significant effect on ecosystems.

• Pollution only affects air quality, not ecosystems.

What is bioaccumulation?

• The buildup of toxins in an organism.

• The process of energy transfer in ecosystems.

• The absorption of nutrients by plants.

• The migration of species to new habitats.