Chapter 3: The Biosphere

A (a)   factor is any living part of an environment

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In ___ , certain bacteria convert nitrogen gas into ammonia

• Assimilation

• Nitrogen fixation

• Denitrification

• Nitrification

Describe happens in denitrification?

Answer explanation

In denitrification other soil bacteria convert nitrogen compounds called nitrates back into nitrogen gas.

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Which ecological pyramid shows how much energy available at each trophic level?

• Pyramid of Energy

• Pyramid of Numbers

• Pyramid of Biomass

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An (a)   factor is any nonliving part of an environment

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Which of the choices describes a biosphere

• All the organisms that live in a place, together with their physical environment

• A group of ecosystems that share similar climates and typical organisms

• A group of individuals that belong to the same species and live in the same area

• Consisting of all life on earth and all parts of the Earth in which life exists.

What is the scientific study of interactions among organisms and between organisms and their environment?

(a)  

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Organisms that can capture energy from nonliving sources and convert them into forms that cells can use are called?

• Scavengers

• Autotrophs

• Heterotrophs

• Herbivores

What are autotrophs also referred to as?

(a)  

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Explain the process of Photosynthesis (Please include the reactants and products)

Answer explanation

Photosynthesis captures light energy and uses it to power chemical reactions that convert carbon dioxide and water into oxygen and energy-rich carbohydrates such as sugars and starches.

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