NEW
Font size
S
M
L
XL
WorksheetsAP Biology Food Webs and Energy Pyramids
Total questions: 24
Worksheet time: 52mins
Name
Class
Date
1.
A team of ecologists observed feeding patterns of several populations in the desert. The energy pyramid shown below depicts the feeding patterns the ecologist observed. Which of the following best explains the difference in the amount of available energy in the trophic levels of the desert ecosystem?
a)
There is less energy available in the producers because their tissues are less dense than those at higher trophic levels.
b)
There is more energy available in the second trophic level because less energy is needed for hunting compared to the higher trophic levels.
c)
There is more available energy in the birds of prey because they have greater muscle mass for storing energy than organisms in lower trophic levels have.
d)
There is less available energy in the fourth trophic level because of the loss of energy through metabolism in each of the lower trophic levels.
2.
A diagram of a food web is shown below.Which level would have the least available energy
a)
Hawk
b)
Rabbit
c)
Grasshopper
d)
Mouse
3.
The diagram shows the cycling of nutrients in an ecosystem. The removal of which of the following groups would cause an immediate decrease in the amount of energy flowing through the system?
a)
Producers
b)
Consumers
c)
Decomposers
d)
Inorganic nutrients
4.
Which of the following statements is true about natural systems?
a)
Consumers form the bottom levels of both the energy pyramid and the biomass pyramid.
b)
Producers are at the bottom level of both the energy pyramid and the biomass pyramid.
c)
Producers are at the bottom of the energy pyramid, but at the top of the biomass pyramid.
d)
Producers are at the bottom of the energy pyramid, but at the top of the biomass pyramid.
5.
Which of the following would be the most likely effect, if there were a sudden increase in the cricket population?
a)
There would be a decrease in the small bird population.
b)
There would be a decrease in the grass/flowers population.
c)
There would be a decrease in the mice population.
d)
There would be an increase in the grass/flowers population.
6.
Which organism has the most energy and which organism has the least amount of energy? Choose the best answer.
a)
mosquito and grass
b)
mouse and grass
c)
grass and owl
d)
grass and small bird
7.
If additional snakes are introduced into this ecosystem, there will most likely be an immediate decrease in the _________.
a)
hawk population
b)
rabbit population
c)
wildflower population
d)
grass population
8.
If the primary producers have 10,000 kcal how much do the secondary consumers have?
a)
1,000 kcal
b)
100 kcal
c)
10 kcal
d)
1 kcal
9.
Which organism receives the least amount of energy from the producer?
a)
Owl
b)
Grasshopper
c)
Lilypad
d)
Mouse
10.
Rocks, water, air, sun, and soil are...
a)
biotic
b)
abiotic
11.
Ants, birds, rabbits, and snakes are...
a)
biotic
b)
abiotic
12.
As shown in this foodweb, which of these is NOT an omnivore?
a)
The grouse
b)
The grizzly bear
c)
They are all omnivores
d)
The marmot
13.
What does a food web represent?
a)
All connections of energy flow throughout all organisms in a habitat.
b)
The specific ways that mutualism is carried out.
c)
A single pathway or energy flow between organisms.
d)
How carnivores get their food.
14.
If there are 100 Kcal of energy available in the producers, how much energy would be available in the herbivores?
a)
10 Kcal
b)
1 Kcal
c)
100 Kcal
d)
1000 Kcal
15.
The diagram represents a model of a food pyramid. Which statement best describes what happens in this food pyramid?
a)
More organisms die at higher levels than at lower levels, resulting in less mass at higher levels.
b)
Energy is lost to the environment at each level, so less mass can be supported at each higher level.
c)
When organisms die at higher levels, their remains sink to lower levels, increasing the mass of lower levels.
d)
Organisms decay at each level, and thus less mass can be supported at higher levels
16.
For a food chain A B C D, If there are 50,000KJ of E available in A, how much of that energy will be available for D?
a)
5000
b)
500
c)
50
d)
5
17.
Which letter in the food web represents the decomposers
a)
A only
b)
B only
c)
A and B
d)
E
18.
Which letter in the food web represents the decomposers
a)
A only
b)
B only
c)
A and B
d)
E
19.
Which letter (s) in the food web would contain the most energy?
a)
A only
b)
B only
c)
A and B
d)
E only
20.
Which letter in the food web would represent a carnivore
a)
A
b)
C
c)
D
d)
F
21.
What percent of the biomass in the forest community represented above is tied up in the shrub layer?
a)
4.9 x 10 4
b)
.5 x 10 4
c)
4.9 x 103
d)
5 x 10 3
22.
How much carbon (in g/m2) is released into the atmosphere as a result of the metabolic activity of herbivores?
a)
125 g/m2
b)
65 g/m2
c)
60 g/m2
d)
5 g/m2
23.
The food web represented above does not include bacteria and decomposers. Which of the following best describes a consequence of having no bacteria and fungi in the food web
a)
grasses will have no direct access to chemical components recycled from dead organisms
b)
rabbits will have no direct access to energy absorbed from secondary consumers
c)
shrews will have no direct access to matter transferred from tertiary consumers
d)
hawks will have no direct access to nitrogen acquired from the atmosphere
24.
A student proposes a model of energy pyramid for an isolated ecosystem, as shown above. The amount of energy available at each trophic level is given in Kcal/m2/year. According to the proposed model, what percent of the available energy is transferred from one trophic level to the next?
a)
21649
b)
7
c)
15
d)
10
Reset
