Biology Review: Concepts 1-3 Ecology

A group of eagles living around Lake Tahoe would be considered a(n):

• Population

• Ecosystem

• Abiotic factor

• Community

Fish, their predators and the water, sunlight, and plants that they rely on would be considered a(n):

• Abiotic factor

• Population

• Ecosystem

• Community

Which of the following is NOT a characteristic of living things?

• Moves around

• Uses energy for metabolism

• Reproduces

• Contains cells

A field of sunflowers facing towards the sun is an example of....

• Metabolism

• Growth

• Response to stimuli

• Asexual reproduction

If an organism divides and produces an exact copy of itself, the organism

• Must have a virus and be infecting its own cells

• Has reproduced asexually

• Must be a combination of two parents

• None of the above

What is one biotic factor that affects the size of a population in an ecosystem?

• Local geography

• Number of predators present

• Average yearly temperature

• Average yearly precipitation

Organisms, such as plants or phytoplankton that carry out photosynthesis would cause a decrease of which gas in the atmosphere?

• Carbon dioxide

• Oxygen

• Ozone

• Water

In the carbon cycle, decomposers return carbon to the soil. Which of the following is NOT something decomposers can break down?

• The bodies of dead plants and animals

• Waste products like urine or feces

• Carbon dioxide found in the air

• Scraps of discarded food

Humans increase carbon dioxide in the atmosphere, and contribute to the carbon cycle by....

• Planting trees to improve photosynthesis

• Combustion from driving cars

• Using more solar power electricity

• Conserving energy with alternative energies

Nitrogen in the air must be "fixed" before it can be used by plants. Atmospheric nitrogen is "fixed" by...

• Bacteria and insects

• Bacteria

• Plants

• Bacteria and fungi