Chapter 3 Ecosystem Test

Front

What is nitrogen fixation?

Back

The process by which nitrogen in the atmosphere is converted into ammonia or related nitrogenous compounds in soil, primarily by bacteria.

Front

How do plants obtain phosphorus?

Back

Plants absorb phosphorus from the soil through their roots.

Front

What are primary producers in an ecosystem?

Back

Organisms that produce their own food through photosynthesis or chemosynthesis, forming the base of the food web.

Front

What role do phytoplankton play in marine ecosystems?

Back

Phytoplankton are primary producers that perform photosynthesis, providing food and oxygen for marine life.

Front

What is the significance of photosynthesis in the carbon cycle?

Back

Photosynthesis removes carbon dioxide from the atmosphere and converts it into organic matter, which is essential for life.

Front

How can human activities impact the water cycle?

Back

Human activities such as deforestation and urbanization can alter transpiration rates and increase surface runoff, affecting rainfall patterns.

Front

What is the process of chemosynthesis?

Back

Chemosynthesis is the process by which certain organisms convert carbon molecules and nutrients into organic matter using the oxidation of inorganic molecules as a source of energy.

Front

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

Back

A food chain is a linear sequence of organisms through which nutrients and energy pass, while a food web is a complex network of interconnected food chains.

Front

What is denitrification?

Back

Denitrification is the process by which bacteria convert nitrates in the soil back into nitrogen gas, releasing it into the atmosphere.

Front

What is transpiration?

Back

Transpiration is the process by which water is absorbed by plant roots, moves through plants, and is released as vapor through pores in leaves.