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CP Biology
TAKE-HOME ASSIGNMENT
February 2012
ECOLOGY Ch.3-6
Name_____________
Period ____________
Date Assigned: ____________ DATE DUE: _____________
(LATE PENALTY – 5 points/ day)
**This is an independent assignment**
Use your TEXTBOOK (not ask.com)
Grade value of this packet: 50 points
a. Concept review questions (35 points)
b. Three activity/review sheets (15 points)
Ecology is the subject of Unit 2 in your text, comprising Chapters 3-6. This packet
and subsequent class time will focus on basic concepts and terminology to establish a
sound framework, which will be expanded upon in class and followed by an assessment.
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C.P. BIO: ECOLOGY CONCEPT REVIEW
TYPE your answers to the following questions in complete
sentences. (Attach it to this packet.)
Chapter 3 : The Biosphere
1. What is ecology? How do earth’s biotic (living) and abiotic (nonliving) parts
interact to affect the survival of organisms?
2. What is a trophic level? What is meant by “The 10% Rule” and why does it
limit the total number of trophic levels in an ecosystem?
3. How does the way that matter (chemicals) moves through the biosphere
differ from the way energy flows?
4. List four substances that cycle between living and nonliving parts of the
biosphere. Why is it important for nutrient materials to cycle?
Chapter 4: Ecosystems and Communities
5. Name three greenhouse gases and explain how they warm the earth’s
surface temperature.
6. What is an ecological niche? How does an organism’s niche and competition
among organisms shape communities?
7. What is symbiosis? Describe how mutualism differs from commensalism and
give an example of each.
8. Give an example of competitive exclusion and of resource sharing.
Chapter 5: Populations
9. What is carrying capacity? What happens when a population reaches its
carrying capacity in a particular environment?
10. What are some factors that control the size of a population?
11. What are limiting factors? What happens when a population is introduced
into a new environment?
Chapter 6: Humans in the Biosphere
12. Describe three ways humans affect regional and global environments.
13. Why does pollution often affect organisms at the top of the food chain
more than those at lower trophic levels?
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Name
Class
Date
3.1 What Is Ecology?
Complete the following statements, using the Word Bank.
Biome
Biosphere
Community
community
biotic
organism
ecosystem
population
ecology
Organization in the Environment

____________ is the scientific study of interactions among organisms and between
organisms and their environment.

There are several levels of organization in the biosphere:
1. A(n) ______________________ is an individual living thing.
2. A group of the individuals that belong to the same species and live in the
same area is called a __________________________
3. A collection of different populations that live together in the same area is
called a _____________________
4. The ____________________________ includes all the organisms that live in
a particular place, together with their physical environment.
5. A group of ecosystems that have similar climates and organisms is called a
_______________________
6. All the biomes on earth make up the ______________________, which is all
the parts of the earth where life can be found..
Label each level in the biosphere
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Biotic and Abiotic Factors
Use the terms in the box to fill in the Venn diagram. List parts of the environment that consist of biotic
factors, abiotic factors, and some components that are a mixture of both.
air
animals
bacteria
soil
fungi
plants
precipitation
temperature
sunlight
Both
Biotic
Factors
Abiotic
Factors

All the living components of an ecosystem are called the ___________ factors.

All the non-living components of an ecosystem are the ______________ factors.
Food Chains and Food Webs
1. Complete the table about feeding relationships.
Feeding Relationships
Relationship
Description
Food Chain
Food Web
1. DRAW ARROWS between the
organisms to show how energy
moves through this food chain.
2. WRITE producer, herbivore, or
carnivore under each organism.
3. WRITE 1st for first-level consumer,
nd
2Name
for nAnnAME
second-level consumer,
rd
3 for third-level consumer, or
4th for fourth-level consumer
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Ch. 4.2 - Niches and Community Interactions
Complete the Lesson Summary, using the Word Bank.
Survive
water
niche
nutrients
reproduce
habitat
mutualism
predation
competitive
commensalism
community
parasitism
The Niche Every species has its own tolerance, or a range of conditions under which it can grow
and________________. A species’ tolerance determines its______________, the place where it lives.
A ____________consists of all the physical and biological conditions in which a species lives and
the way the species obtains what it needs to survive and reproduce.
An organism’s niche must contain all of the resources an organism needs to __________. A
resource is any necessity of life, such as _________, _______, light, or space.
Competition Competition occurs when organisms try to use the same limited resources.
Direct competition between species often results in one species dying out. This is the basis of the
_______________ exclusion principle. This principle states that no two species can occupy exactly
the same niche in exactly the same habitat at the same time.
Competition helps to determine the number and type of species in a community.
Symbioses Symbiosis occurs when two species live closely together in one of three ways:
mutualism, commensalism, or parasitism.
In _____________________, both species benefit from the relation ship.
In ___________________, one species benefits by living in or on the other and the other is harmed.
In _________________, one species benefits and the other is neither helped nor harmed.
Symbiosis Match the examples below with the type of relationship (A, B, or C).
A
relationship type may be used more than once.
A. mutualism
B. commensalism
C. parasitism
13. a tick living on the body of a deer
14. a bee eating a flower’s nectar and picking up the flower’s pollen
15. a barnacle living on a whale’s skin
16. a tapeworm living in a person’s intestines
17. an aphid providing food to an ant in exchange for protection
Niche Three different bluebird species live in the same tree. One species feeds at the top of the tree,
the second species feeds in the middle part of the tree, and the third species feeds at the bottom of the
tree. Do all three species occupy the same niche? Explain.
_______________________________________________________________________
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