Ecology

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

• abiotic factor

• population

• community

• ecosystem

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

• abiotic factor

• population

• community

• ecosystem

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

• metabolism.

• response to stimuli

• growth.

• asexual reproduction.

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

• has reproduced sexually.

• must have a virus and be infecting its own cells.

• has reproduced asexually.

• has reproduced through the process of meiosis

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?

• Oxygen

• Carbon dioxide

• Water

• Ozone

In the carbon cycle, decomposers return carbon to the soil. Which of the following is NOT something that

decomposers can break down?

• Waste products like urine or feces

• The bodies of dead plants and animals.

• Carbon dioxide found in the air

• Scraps of discarded food

Humans increase carbon dioxide (CO2) in the atmosphere, and contribute to the carbon cycle by

• combustion from driving cars.

• planting trees to improve photosynthesis

• conserving energy with alternative energies.

• using more solar power electricity.

When deforestation (cutting down trees) occurs in an area, what immediate effect does this have on the water cycle?

• More water is returned to the atmosphere by transpiration.

• There is less runoff water, but more transpiration.

• More photosynthesis occurs, and CO2 begins decreasing.

• Less is returned to the air by transpiration.

Water can be returned to the atmosphere through the leaves of plants by

• evaporation.

• condensation.

• precipitation.

• transpiration.