Bioenergetics

Identify the cycle pictured

• The Nitrogen Cycle

• The Water Cycle

• The Carbon Cycle

• The Phosphorous Cycle

True/False, Plants can use nitrogen directly from the atmosphere.

• true

• false

Nitrogen in the atmosphere is not available. Free nitrogen has to be changed into a usable form in a process called ____

• nitrogen fixation

• transpiration

• photosynthesis

• cellular respiration

where do animals get nitrogen from?

• from the soil

• from the water they drink

• directly from the air

• from the plants they eat

Which of the following describes the role of nitrogen-fixing bacteria in the nitrogen cycle? Nitrogen-fixing bacteria convert

• nitrates intro nitrogen gas
• ammonia into proteins
• nitrogen gas into ammonia
• proteins into nitrates

Growing legumes such as alfalfa or soy beans increases

• denitrification
• nitrogen fixation
• ammonification
• ammonium oxidation

Species that are clearly critical to the functioning of an ecosystem are known as

• biodiversity

• keystone species

• main species

• native species

Biodiversity, aka biological diversity, usually refers to

• the same species in a general location

• the number of different species in a given area

• the number of animal species in a given area

• the number of plant species in a given area

a species that is not native to a particular region and has no natural predators and little competition

• consumer species

• producer species

• invasive species

• adapted species

A population is

• a group of similar species in different areas

• a group of the same species in the same geographic area.

• a group of several species in the same geographic area

• a group of several species along with their abiotic factors in a small area.