Biotic & Abiotic

Which is an example of an abiotic factor in a
pond environment?

• The water
• A frog
• A grasshopper
• A snake

Which is an example of a biotic factor that would limit the size of a deer herd?

• Populations of predators
• Severe summer droughts
• Lack of oxygen at high altitudes
• Heavy winter snowfalls

Which is a biotic factor that affects the size of a  population in the specific ecosystem?

• Average temperature of the ecosystem
• Number and kinds of soil minerals in the
  ecosystem
• Number and kinds of predators in the
  ecosystem
• Concentration of oxygen in the ecosystem

In a forest ecosystem, the abiotic factors include...

• Light, temperature, and plants
• Animals, water, and soil
• Minerals, oxygen, and protists
• Water, soil, and temperature

Which is a biotic factor operating within an
ecosystem?

• Type of climate in a given region
• Carnivores that consume other animals
• Amount of helium gas in the air
• Rate of flow of water in a river

Which event illustrates the interaction of an abiotic factor with a biotic factor in the environment?

• Lamprey eel survives by parasitizing trout.
• Temperature of water affects its oxygen level.
• Low light intensity of the forest affects the growth of pine trees.
• Gypsy moth caterpillar eats the leaves of an
  apple tree.

An abioitic factor affecting the behavior survival of such organisms as robins and violets is the ...

• Population of rabbits.
• Length of daylight.
• Presence of harmful bacteria.
• Number of herbivores.

Which is an example of a changing biotic factor in an ecosystem?

• Seasonal changes in temperature.
• Increase in sunlight during the summer.
• Seasonal migration of birds.
• Increase in the usual amount of winter snowfall.