Ecosystems comprehension

What is an ecosystem?

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

• The interaction of a community with non-living parts of the environment

• A collection of different species living in the same habitat

• A single organism living in its natural habitat

What is the purpose of using quadrats in ecology?

• To estimate the distribution and abundance of organisms within a large area

• To identify the types of minerals in the soil

• To determine the pH level of the soil

• To measure the height of plants

What does biodiversity measure?

• The moisture levels in an ecosystem

• The rate of photosynthesis in plants

• The amount of light intensity in a habitat

• The range of species living within an ecosystem

Which of the following is an abiotic factor?

• Food availability

• Competition among species

• Soil pH and mineral content

• New predators

What are producers in a food chain?

• Carnivores that eat primary consumers

• Organisms that make their own food by photosynthesis

• Herbivores that only eat plants

• Bacteria and fungi that decompose dead matter

What percentage of biomass is typically transferred from one trophic level to the next?

• About 50%

• About 25%

• About 10%

• About 1%

What is the main role of decomposers in the carbon cycle?

• They break down compounds, releasing CO2 into the air

• They produce oxygen through photosynthesis

• They consume primary consumers

• They convert nitrogen gas into nitrates

What is a consequence of acid rain?

• It increases the rate of photosynthesis

• It enhances the oxygen carrying capacity of red blood cells

• It leads to the growth of aquatic organisms

• It corrodes metals and limestone in buildings

What is the effect of greenhouse gases on Earth's temperature?

• They reflect sunlight, cooling the Earth

• They absorb infrared radiation, increasing the Earth's temperature

• They have no effect on the Earth's temperature

• They decrease the Earth's temperature

What is eutrophication?

• The increase in water levels due to melting glaciers

• The clearing of an area of trees on a mass scale

• The rapid growth of algae due to excess nutrients in water bodies

• The process of converting nitrogen gas into nitrates