Ecology Practice Test Part 2 Question Preview (ID: 38475)


Ecology Part 2. TEACHERS: click here for quick copy question ID numbers.

Which of these BEST explains why predators need plants, such as grass, in their ecosystems?
a) Plants are a large part of their diets.
b) Plants provide food for the animals that the predators eat.
c) Plants break down the organisms that the predators eat.
d) Plants provide safety for the predators.

Near a pond, hawks feed on shrews, shrews feed on cattail plants. What is the original source of energy?
a) cattail plants
b) shrews
c) hawks
d) the sun

Green plants convert energy from the sun into energy stored in carbon-containing molecules such as sugar. What is the process that the plants use to make food?
a) hydrolysis
b) photosynthesis
c) mutation
d) energy role

Patrick's class studied a forest food web. Which of these organisms can BEST turn dead plant and animal matter into substances that can be reused by the ecosystem?
a) decomposers
b) minerals in the soil
c) the sun
d) plants

Which would not be a limiting factors for a population of squirrels in a forest.
a) fire
b) drought
c) many predators
d) plenty of food resources

On an energy pyramid that includes hawks, snakes, grass, and mice, which organism has the largest population and is on the bottom of the pyramid?
a) mice
b) grass
c) snakes
d) hawks

The removal of which organism would have the GREATEST effect on all remaining organisms any the food web?
a) hawk
b) spider
c) sparrow
d) grass

What do the arrows in a food web represent?
a) the location and movement of organisms within the food web
b) which organisms are most closely related within the food web
c) the movement of carbon dioxide through the organisms in a food web
d) the transfer of matter and energy through the organisms in a food web

Samantha's class studied a forest food web. Which of these organisms can BEST turn dead plant and animal matter into substances that can be reused by the ecosystem?
a) bacteria
b) birds
c) mice
d) plants

In a salt marsh food web, the snails feed on a type of fungus that grows on the cord grass, they scrape and damage the cord grass. Blue crabs eat snails. What would MOST LIKELY happen if the number of blue crab suddenly decreased?
a) The number of fish would decrease as the snails ate more fish.
b) The Sun would need to provide more energy to power the entire web.
c) The cord grass would have more room and the fungus available would increase.
d) The number of snails would increase and result in more damage to the cord grass.

How do you know that an organism is a first level consumer?
a) The organism is eating plants.
b) The organism will break down dead and decaying plant material.
c) The organism is a carnivore.
d) The organism will make its own food.

Samantha's class studied a forest food web. Which of these organisms can BEST turn dead plant and animal matter into substances that can be reused by the ecosystem?
a) bacteria
b) birds
c) mouse
d) vulture

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