Ecology Test Review

Reference the food web diagram given. Which organism is the secondary consumer?

• Slug

• Hawk

• Thrush

• Rabbit

Which process in the water cycle is facilitated by producers?

• Transpiration

• Runoff

• Precipitation

• Evaporation

True or False: A learner stated "The carrying capacity is the minimum number of individuals that is needed to prevent a population from disappearing."

• True

• False

Which of the following would be an example of secondary succession?

• The first growth on land uncovered when a glacier retreats

• Lava flows from a volcano and hardens into rock

• The growth of seedlings after a flood

• A landslide uncovers an area of bare rock

What does a population pyramid represent?

• A population's dispersal pattern

• A population's growth rate

• A population's trophic levels

• A population's age-sex structure

The symbiotic relationship shown in this picture is an example of which of the following?

• Parasitism because the insect feeds on the nectar of the flower

• Mutualism because the flower provides the insect with food, and the insect pollinates the flower

• Parasitism because the insect lives off the nectar from the flower

• Commensalism because the insect does not harm the flower and the flower does not benefit from the relationship

Analyze this diagram of the nitrogen cycle. What would be the most likely result if the denitrification bacteria died?

• Animal waste would no longer produce ammonia

• The levels of nitrate in the soil would drop

• Nitrogen gas could not enter the soil

• Nitrogen would not be return to the atmosphere

What form does energy enter most ecosystems?

• Soil and water

• Sunlight

• Food

• Water

Refer to the diagram of the carbon cycle. What is an activity that is adding carbon dioxide to the atmosphere?

• Cellular respiration

• Sedimentation

• Erosion

• Decomposition

As the population in the logistic growth model approaches carrying capacity, what happens to the growth rate?

• Becomes exponential

• Slows to zero

• Doubles

• Increases