Abiotic and Biotic Factors Mini Quiz

Organisms that live on land rarely compete for

• Food

• Space

• Water

• Oxygen

Which list contains only abiotic conditions that might be found in a pond ecosystem?

• temperature of the water, green plant populations, dissolved minerals in the water

• temperature of the water, dissolved oxygen in the water, dissolved minerals in the water

• bacteria, dissolved minerals in the water, temperature of the water

• dissolved oxygen in the water, fish populations, insect populations

Carnivorous plants, such as pitcher plants and sundews, live in bogs where many other organisms cannot. Due to the high rate of decomposition occurring in bogs, the environment is acidic and contains very little oxygen and nutrients. The bogs only support certain types of organisms because

• organisms in an environment are not limited by available energy and resources

• the growth and survival of organisms depends upon specific physical conditions

• favorable gene mutations only occur when organisms live in harsh environments

• photosynthetic organisms can only inhabit environments that have a low acidity

Many biotic factors affect individuals in a population. An example of an organism being directly affected by a biotic factor is

• a squirrel cannot find a mate(Correct)

• a flood washes away a maple tree

• a plant is in a dark room

• a plant is in a dark room

As it grows from a seed to a mature plant, a plant will grow taller and thicker. Which are abiotic factors most responsible for the increase in the mass of the plant?

• water, minerals, bacteria

• sunlight, oxygen, plant receptors

• minerals, water, plant enzymes

• water, sunlight, carbon dioxide

Which statement best describes how a major change in the size of one population affects an ecosystem?

• It will immediately affect every population and the physical conditions.

• It will affect the physical conditions, but not the other populations.

• It could directly or indirectly affect the physical conditions and any population.

• It affects every population, not the physical conditions.