Name
Period
Date
Test: Ecology
50 pts
1.
a. Fill in the boxes above with living organisms on at least 3
different trophic levels, and draw arrowheads on the lines. (2 pts)
b. Is the picture is a food web or a food chain? Explain your answer.
(2 pts)
c. How many second order consumers are there in your diagram
above? Name it/them and explain your answer. (2 pts)
d. Could the energy in a first-order consumer have been previously
in a second-order consumer? Explain your answer. (1 pt)
2. If there are 105,000 units of energy at the producer level, how many
units of energy are available at the 4th-order consumer level of an
energy pyramid? Explain. (2 pts)
3. What is the source of carbon in third-order consumers? What is the
source of carbon in producers? Explain. (4 pts)
4. Using the following list of words:
a. Label them to the left as E for Energy or M for matter (3 pts)
b. Circle the words that are part of a cycle through an ecosystem and
underline the words that are part of a flow through an ecosystem. (3
pts)
carbon
Heat
electricity
protein
sunlight
Barking noise from a dog
Read the paragraph, then circle the best answers to the questions
about the relationships below:
The submarine tour of the underwater ecosystem had just begun when
the tour guide pointed out a clownfish hiding within the tentacles of an
anemone. Other clownfish were swimming around the coral reef, not
yet worried about the reef shark and carnivorous grouper swimming
nearby. The remora fish attached to the sides of the shark appeared to
be feasting on some small arthropods attached to the shark. When the
submarine surfaced, they spotted some fishermen: they had released a
remora on a fishing line, the remora had attached itself to a turtle, and
the fishermen had brought both the turtle and remora back in.
5. What kind of relationship is shown by the reef shark and the
grouper? (2 pts)
a. competition
b. mutualism
c. commensalism
d. parasitism
6. What kind of relationship is shown by the remora and the turtle? (2
pts)
a. competition
b. parasitism
c. commensalism
d. predator/prey
7. Name and explain 3 relationships in the story where one creature
could benefit and the other could be harmed. (3 pts)
8. Use the graph about coyote and mouse populations to answer the
questions below:
a) On the graph, label one line as the mice (prey) and one line
as the coyotes (predator). Explain your choice. (2 pts)
b) What would happen to the mouse population if the
coyotes suddenly died out (assume there are no other
predators in the area)? What shape would the graph be? (2
pts)
c) List three limiting factors that might slow down the mouse
population growth. (3 pts)
9. Suppose you were trapped on a desert island with 10 chickens and
several bushels of corn as your only food. You will not be rescued for
a month (!), which is not a long enough time to grow more corn.
Which should you do to survive? (Only use the options below.) Explain
your answer. (2 pts)
A) eat the chickens first, then the corn; or
B) eat the corn first, then the chicken;
C) feed the corn to the chickens, then eat the eggs from the
chickens
10. What is the approximate human population of the planet in 2015?
(1 pt)
11. a) Use the data table to sketch the population growth curves of
India and China. (3 pts)
Year
China
India
1950
0.56 billion
0.35 billion
2015
1.37 billion
1.29 billion
2040
1.45 billion
1.52 billion
b) Describe the shape of each curve. (2 pts)
c) Does either curve show evidence of limiting factors? Explain. (2 pts)
12. Use the organisms from the Farmer DeJohn demo in this question:
• Each 1 acre of land produces 750 kg of corn, which can support
- 1 adult human (weighs 75 kg)
- 75 chickens
- or 1/3 of a cow
choices for example organisms: corn, chicken, cow, human
a) Draw two energy pyramids, one with example organisms on two levels,
and one with example organisms on three. (3 pts)
b) Farmer DJ has to feed his two growing nieces now. Each of these twins
has a mass of 25 kg. On his plot of 60 acres, tell how much land he needs
to support himself (75kg) and his 2 nieces as vegetarians. EXPLAIN WHY.
(2 pts)
c) Describe how much land he needs to use if he and the girls eat as
carnivores, and EXPLAIN WHY. (2 pts)