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

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

• moves around

• uses energy for metabolism

• contains cells

• reproduces

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

• metabolism

• response to stimuli

• growth

• asexual reproduction

At which point in the cladogram to the right do you think would represent having the characteristic of wings?

• A

• B

• C

• E

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

• must have a virus and be infecting its own cells

• must be a combination of two parents

• has reproduced sexually

• 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?

• oxygen

• carbon dioxide

• water

• ozone

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