APES Unit 1

roughly what percent of income solar radiation (insulation) is converted into chemical energy by producers

1%

if grass stores 1000 energy units received from the Sun, the ethological efficiency of the ecosystem is 10% and the trophic levels are grass-> cow-> human. How many units of energy does the human receive of the original 1000 units

10

An ecosystem has a ecological efficiency of 10%. If the producer level Contains 10000 kilocalories of energy how much energy does the tertiary consumer level contain?

10 KCAL

in the given ecosystem, producers convert solar energy into 15000 KCAL of chemical energy stored in organic compounds. Which of the following is the most likely amount of energy available to secondary consumers

150 KCAL

the net primary productivity of an ecosystem is 1 kg per cm2 / year, and the energy needed by The Producers for their own respiration is 1.5 kg per cm2 / year. The gross primary productivity of such an ecosystem would be

2.5 kg cm2 / year

the net annual primary productivity of a particular Wetland ecosystem is found to be 8000kcal/m2 per year. If respiration by The Aquatic producers is 12000 kcal/m2 per year, what is the gross annual primary productivity for this ecosystem in kcal/m2 per year

20000

use the following choices to answer the question; a. Producers B. Decomposers C. Primary consumers D. Secondary consumers e. Tertiary consumers at which trophic level do organisms perform a function that produces oxygen as a waste product?

A

which of the following best explains why terrestrial trophic pyramids usually do not have levels higher than tertiary consumers

A large proportion of energy is lost as heat as it is transferred up the pyramid, so there is not enough energy available to support another level.

most of the energy input in a food chain is

Degraded to low quality heat

use the following choices to answer the question; a. Producers B. Decomposers C. Primary consumers D. Secondary consumers e. Tertiary consumers at which trophic level are dragonflies. Consume mosquitoes that feed on herbivores mammals

E

for a primary producer, the main function of photosynthesis is to manufacture

Glucose

based on the data in the table, which of the following pairs of organisms have to at The Logical relationships both competition and predation

Hawks and snakes

which of the following has the least net primary productivity

Tundra

around hot-water vents deep in the ocean live specialized communities. Bacteria turn hydrogen sulfide into reduced carbon compounds through chemosynthesis. the bacteria then provide food to other life-forms. Compared to terrestrial food chains, the bacteria feel the same role as

autotrophic primary producers

which of the following organisms occupies the lowest trophic level

deer

the percentage of usable energy transferred as biomass from one trophic level to another is known as

ecological efficiency

which of the following best describes the movement of energy in an ecosystem

energy is harnessed by producers, and available energy decreases with each trophic level transfer

complex feeding patterns for consumers in an ecosystem are called

food webs

at which trophic level do organisms perform a function that produces oxygen as a waste product

primary producers

at which trophic level are eagles that consume fish that eat algae

secondary consumer

beginning at a lowest trophic level, arrange the following food chain found on the sergenti plane in Africa in the correct sequence

shrubs, gazelles, cheetahs, decomposers

At which trophic level are dragonflies that consume mosquitoes that feed on herbivores mammals

tertiary consumers

the 10% rule of energy transfer in a food chain is due to

the second law of thermodynamics