Natural Environment and Ecosystems

What is the impact of climate change on global food security?

• Climate change can lead to increased agricultural productivity.

• Climate change can disrupt food production, leading to increased hunger and food insecurity.

• Climate change has no significant effect on food security.

• Climate change only affects food distribution, not production.

What is the carbon cycle?

• The carbon cycle is the process by which carbon is stored in rocks and minerals.

• The carbon cycle is the biogeochemical cycle by which carbon is exchanged between soil, water, and the atmosphere.

• The carbon cycle refers to the movement of carbon through the food chain.

• The carbon cycle is the method by which carbon is produced in the atmosphere through volcanic eruptions.

What is the lag phase in population growth?

• The initial period of rapid growth as resources are abundant.

• The phase where organisms reproduce at their maximum rate.

• The initial period of slow growth as organisms adapt to new conditions.

• The stage where population growth levels off due to environmental resistance.

What is the significance of soil health in ecosystems?

• Healthy soil supports plant growth, retains water, and provides essential nutrients.

• Soil health is irrelevant to plant growth and ecosystem stability.

• Healthy soil only affects the growth of trees, not other plants.

• Soil health is primarily about the color and texture of the soil.

What is the role of keystone species in ecosystems?

• They are the most abundant species in an ecosystem.

• They have a disproportionately large impact on their ecosystem, influencing its structure and function.

• They are always the largest species in an ecosystem.

• They have no significant impact on their ecosystem.

What is the role of primary producers in an ecosystem?

• They convert solar energy into chemical energy through photosynthesis.

• They decompose organic matter and recycle nutrients.

• They consume other organisms for energy.

• They regulate the population of herbivores.

What are mesophytes?

• Plants that thrive in extreme dry environments requiring little water.

• Plants that thrive in moderate environments, requiring a continuous water supply.

• Plants that grow only in aquatic environments with high moisture.

• Plants that can survive in both dry and wet conditions.

What is the nitrogen cycle?

• A process that describes the transformation of nitrogen and nitrogen-containing compounds in nature.

• A method of measuring nitrogen levels in soil.

• A cycle that only involves nitrogen fixation and denitrification.

• A phenomenon that occurs only in aquatic ecosystems.

What is the significance of wetlands in ecosystems?

• Wetlands provide habitat, improve water quality, and act as buffers against flooding.

• Wetlands are primarily used for agricultural purposes.

• Wetlands are areas that are always dry and do not support any life.

• Wetlands are only important for recreational activities.

What is parasitism?

• An interaction where both organisms benefit equally.

• An interaction where one organism benefits at the expense of another.

• An interaction where organisms compete for resources.

• An interaction that has no effect on either organism.