Download Completely describe what might happen if there were a sudden

Completely describe what might happen if there were a sudden decrease in the number of
Everglades crayfish in the food web below.
Please answer here
Draw two food chains below – one aquatic food chain and one terrestrial food chain. Each food chain
must have 5 “links” or organisms. Label each organism then arrange them into an energy pyramid.
On your energy pyramid, show how much energy is available at each level assuming that the base
starts with 9,548 kcal (kcal=energy).
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1. Which of the following descriptions about the organization of an ecosystem is correct?
a. Communities make up species, which make up populations.
b. Populations make up species, which make up communities.
c. Species make up communities, which make up populations.
d. Species make up populations, which make up communities.
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2. The lowest level of environmental complexity that includes living and nonliving factors is the
a. biome.
b. community.
c. ecosystem.
d. biosphere.
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3. In what way are herbivores and carnivores alike?
a. They both use photosynthesis to make their own food.
b. They both obtain energy by consuming other organisms.
c. They both directly consume producers.
d. They both are considered to be autotrophs.
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4. The total amount of living tissue within a given trophic level is called the
a. organic mass.
b. trophic mass.
c. energy mass.
d. biomass.
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5. A model of the complex feeding interactions among organisms in a community from producers to decomposers
is called a
a. food web.
b. ecosystem.
c. food chain.
d. population.
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6. What animals eat both producers and consumers?
a. herbivores
b. omnivores
c. chemotrophs
d. autotrophs
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7. A bird stalks, kills, and then eats an insect. Based on its behavior, which pair of ecological terms describes
the bird?
a. herbivore, decomposer
b. producer, heterotroph
c. carnivore, consumer
d. autotroph, herbivore
__ 14. What is at the base of all ecological pyramids?
a. consumers
b. decomposers
c. producers
d. scavengers
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Figure 3–2
8. What goes in Box 5 of the food web in Figure 3–2?
a. herbivores
b. scavengers
c. carnivores
d. decomposers
9. Only 10 percent of the energy stored in an organism can be passed on to the next trophic level. Of the remaining
energy, some is used for the organism’s life processes, and the rest is
a. used in reproduction.
b. stored as body tissue.
c. stored as fat.
d. eliminated as heat.
__ 10. A word that means the same thing as consumer is
a. producer.
b. autotroph.
c. heterotroph.
d. carbohydrate.
__ 11. Animals that get energy by eating the carcasses of other animals that have been killed by predators or have died
of natural causes are called
a. scavengers.
b. omnivores.
c. heterotrophs.
d. detritivores.
__ 12. Each of the following is an abiotic factor in the environment EXCEPT
a. plant life.
b. soil type.
c. rainfall.
d. temperature.
__ 13. Which is an example of how biotic and abiotic factors interact?
a. Sunlight increases the temperature of pond water.
b. Water and soil mix together to make mud.
c. Tree roots split apart rocks in the ground.
d. Humidity in the air forms fog in a valley.