7
SCIENCE
Second Quarter – Module 2
Levels of Biological Organization
Second Quarter – Module 2
The Levels of Biological
Organization
Department of Education ● Republic of the Philippines
Science – Grade 7
Alternative Delivery Mode
First Quarter – Module 1: The Levels of Biological Organization
First Edition, 2020
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represent nor claim ownership over them.
Published by the Department of Education – Region 10
Regional Director: Dr. Arturo B. Bayocot, CESO III
Assistant Regional Director: Dr. Victor G. De Gracia Jr., CESO V
Development Team of the Module
Author/s:
Norlyn Q. Lobido
Reviewers:
Cheyenne Errf D. Uy
Evaluators:
Marisol P. Moreno
Illustrator and Layout Artist: Rudnie S. Rosala
Management Team
Chairperson:
Co-Chairpersons:
Myraflor E. Besire
Decy Joy V. Jabonilla
Spark Earl E. Balicog
Rizza Mae L. Serino
Grace Marie S. Doong
Dr. Arturo B. Bayocot, CESO III
Regional Director
Dr. Victor G. De Gracia Jr. CESO V
Asst. Regional Director
Edwin R. Maribojoc, EdD, CESO VI
Schools Division Superintendent
Myra P. Mebato,PhD, CESE
Assistant Schools Division Superintendent
Mala Epra B. Magnaong, Chief ES, CLMD
Members
Neil A. Improgo, EPS-LRMS
Bienvenido U. Tagolimot, Jr., EPS-ADM
Samuel C. Silacan, EdD, CID Chief
Maritess A. Caguindangan, EPS - Science
Rone Ray M. Portacion, EdD, EPS – LRMS
Asela I. Elumbareng, DM, PSDS
Nelia T. Lanzaderas, PhD, Principal III/District In-charge
Agnes P. Gonzales, PDO II
Vilma M. Inso, Librarian II
7
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7
SCIENCE
Second Quarter – Module 2
Levels of
of Biological
Biological
Organization
Organization
Levels
OrganizationLevels
odule of
2
Biological
This instructional material is collaboratively developed and
reviewed by educators from public schools. We encourage teachers
and other education stakeholders to email their feedback, comments,
and recommendations to the Department of Education at action@
deped.gov.ph.
Your feedback and recommendations are highly valued.
Department of Education ● Republic of the Philippines
Introductory Message
For the learners:
Welcome to the Science 7 Alternative Delivery Mode (ADM) Module
on Levels of Biological Organization!
Have you ever wondered on what makes up an organism? Do you
think it follows a hierarchical scheme? Yes! Indeed, life is a hierarchy.
Moreover, it follows an organized and specialized system. As a learner, the
scientific study on the different levels of biological organization of an organism
helps you expand your understanding on the complexities of the organism’s
structure and functioning. Organisms from smallest to largest on this planet
(Earth) follow this orientation.
The activities in this learning resource will deepen your understanding
on the different levels of biological organization which will make you a 21st
century learner. This will help develop your 21st century competencies and
skills at your own pace. Your 100% achievement rate in this module lies in
your hands.
This module is designed to enrich you with meaningful opportunities for
guided and independent learning at you own pace and time. You will be able
to process the contents of the learning resource while being an active learner.
This module has the following parts and corresponding icons:
What I Need to Know
This will give you an idea of the skills or
competencies you are expected to learn
in the module.
What I Know
This part includes an activity that aims to
check what you already know about the
lesson to take. If you get all the answers
correct (100%), you may decide to skip
this module.
iv
What’s In
This is a brief drill or review to help you
link the current lesson with the previous
one.
What’s New
In this portion, the new lesson will be
introduced to you in various ways such as
a story, a song, a poem, a problem
opener, an activity or a situation.
What is It
This section provides a brief discussion of
the lesson. This aims to help you discover
and understand new concepts and skills.
What’s More
This comprises activities for independent
practice to solidify your understanding
and skills of the topic. You may check the
answers to the exercises using the
Answer Key at the end of the module.
What I Have
Learned
This
includes
questions
or
blank
sentence/paragraph to be filled in to
process what you learned from the
lesson.
What I Can Do
This section provides an activity which will
help you transfer your new knowledge or
skill into real life situations or concerns.
Assessment
This is a task which aims to evaluate your
level of mastery in achieving the learning
competency.
Additional Activities
In this portion, another activity will be
given to you to enrich your knowledge or
skill of the lesson learned. This also
provides retention of learned concepts.
Answer Key
This contains answers to all activities in
the module.
v
At the end of this module you will also find:
References
This is a list of all sources used in
developing this module.
The following are some reminders in using this module:
1. Use the module with care. Do not put unnecessary mark/s on any part
of the module. Use your Science activity notebook in answering the
exercises.
2. Don’t forget to answer What I Know before moving on to the other
activities included in the module.
3. Read the instruction carefully before doing each task.
4. Observe honesty and integrity in doing the tasks and checking your
answers.
5. Finish the task at hand before proceeding to the next.
6. Return this module to your teacher once you are through with it.
If you encounter any difficulty in answering the tasks in this module, do not
hesitate to consult your teacher or facilitator. Always bear in mind that you are
not alone.
We hope that through this material, you will experience meaningful
learning and gain deep understanding of the relevant competencies. You can
do it!
vi
Table of Contents
What I Need to Know
----------------
1
What I Know
----------------
2
----------------
6
What’s In
----------------
6
What’s New
----------------
8
What is It
----------------
9
What’s More
----------------
10
What I Have Learned
----------------
12
What I Can Do
----------------
13
Assessment
----------------
16
Additional Activities
----------------
20
Answer Key
----------------
21
References
----------------
22
Lesson 1
vii
What I Need to Know
Biology is defined as the branch of science which deals with the
study of life of all the organisms on Earth. It is coined from the two Greek
Words “Bios” which means “life” and “logos” which means “study of”.
All living things exhibit a unique and complex hierarchical
organization. This is arranged in ascending order or from lowest to the
highest level that includes cells, tissues, organs, organ systems, organism,
population, community, ecosystem and biosphere. One concrete example
of a living thing is YOU. You are composed of many parts and each part
has specific function. Every part is interrelated and is necessary for your
continuous existence on this planet. It is guided by the rule, “All for one, one
for all” because these parts of your body will not work alone instead it works
as a whole. One part will not be able to work properly if other part is
missing.
Hence, this module will help you address your questions on how life
is organized. Moreover, students understanding on the sequence of the
biological organizations from smallest to largest shall also be given
emphasis. The scope of this module allows it to be applied in your day to
day existence.
After going through this module, you are expected to describe the
different levels of biological organizations from cell to biosphere (S7LP – IIc
-3).
Specifically, you are expected to:
1. classify organisms into their level of biological organizations; and
2. create a foldable pyramid on the levels of biological organizations.
1
What I Know
Directions: Choose the letter of the best answer. Write the letter of your
answer in your Science activity notebook.
1. Which of the following differentiates organs from tissues?
A. Organs and tissues are made up of cells.
B. Organs and tissues make up an organ system.
C. Organs make up organ systems; cells make up tissues.
D. Organs make up organ systems; tissues make up organs.
2. The organ systems of plants consist of the root and shoot systems.
Why is it important for these organ systems to work together?
A. To grow and survive
B. To avoid pests and other animals
C. To avoid floods and strong winds
D. To survive droughts and earthquakes
3. What level of biological organization is made up of a group of similar
cells that perform a specific function?
A. Organ
B. Organism
C. System
D. Tissue
4. What is formed by a group of cells and tissues that work together to
carry out a specific function?
A. Cell
B. Organism
C. Organ
D. Organ System
2
5. At which smallest level of organization in an organism can the
characteristics of life be carried out?
A. Cell
B. Organ
C. Organ System
D. Tissue
For Item number 6, refer to the picture at the side.
6. To which level of biological organization does the
picture belong?
A. Cell
B. Organ
C. Organism
D. Organism
7. Which is the correct sequence – from the lowest to highest – of the
levels of organization in an organism?
A. Cells
Tissues
Organisms
Organs
Population
Organ systems
Community
Ecosystem
Biosphere
B. Cells
Tissues
Organisms
Organs
Community
Organ systems
Population
Ecosystem
Biosphere
C. Cells
Organs
Organisms
Tissues
Population
Organ systems
Community
Ecosystem
Biosphere
D. Cells
Tissues
Organisms
Organs systems
Population
Community
Organ
Ecosystem
Biosphere
8. Which of the following units is the highest level of biological system?
A. Biosphere
B. Community
C. Ecosystem
D. Population
3
9. Which of the following statements is TRUE?
A. Groups of organs working together are called cells.
B. Groups of cells working together are called tissues.
C. Groups of organs working together are called organisms.
D. Groups of tissues working together are called organ systems.
10. How do you call a group of same species living together?
A. Biome
B. Community
C. Ecosystem
D. Population
11. Which of the following is a population?
A. Mountain stream
B. All the frogs in a pond
C. Hawks, barred owls, and eagles on Davao
D. Blue-tailed skinks (lizards) and snakes around a barn
12. What level of biological organization is being referred to when many
organ systems work together?
A. Cells
B. Organ
C. Organism
D. Organ System
13. How do you call the collection of organisms that belong to different
populations but all live in the same area and interact with one
another?
A. Biosphere
B. Community
C. Ecosphere
D. Population
4
14. Which of the following is the simplest level of ecological
organization?
A. A population
B. A community
C. An ecosystem
D. An Organism or Species
15. Which of the following DOES NOT belong to the group?
A. Eyes
B. Large Intestine
C. Mouth
D. Stomach
5
Lesson
1
Levels of Biological
Organization
What’s In
Before starting with this module, go back on the things that you have
learned about the Compound Microscope. Answer Activity 1: Complete Me!
The Microscope Crossword Puzzle Activity to refresh your learning of the
previous modules.
Activity 1: Complete Me! The Microscope Crossword Puzzle
Directions: Fill in the crossword puzzle on the parts and functions of a
compound microscope. Match the number of the clues placed across or
down the grid. If filled correctly, the words will fit neatly into the puzzle. Write
your answer in your Science activity notebook.
Figure 1. Crossword Puzzle on Parts and Functions of a Compound Microscope
6
Stage
Light Source
Adjustment knob
Eyepiece
Microscope
Objectives
Base
Nosepiece
Tube
ACROSS
Diaphragm
Arm
Stage Clips
DOWN
2. Located on the side of the
1. Holds the slide in place on the
frame, used to adjust the focus of
stage
the microscope
3. Located on the stage, adjusts the
7. The lens or system of lenses in
amount of light passing into the slide
a microscope that is nearest to
4. Magnifier of the image of small
the object being viewed
objects
8. Supports upper part of the
5. Combination of lenses at the
microscope
viewing end of optical instruments
9.Small platform where the
6. The bottom of the microscope,
specimen is mounted for
used for support
examination
10. Light or mirror that projects
light through the diaphragm
11. Holds two or more objective
lenses and can be rotated to
change power
12. Connects the eyepiece to the
objective lenses
Great Job! You are now ready to continue to the next level.
Have Fun & Enjoy!
7
What’s New
Have you ever asked yourself on what makes you up and the other
organisms around you? This question could be addressed as you go along
with this module.
I want you first to observe carefully the picture. Then,
think over and answer the questions below.
1. What parts of the human body do you see?
2. To which organ systems do these parts belong?
3. What could probably happen if one organ or body
part does not function well?
What is It
Levels of Biological Organization
Organisms are categorized according to the number of cells in the
body, either unicellular or multicellular.
A unicellular organism depends
upon just one cell for all of its functions while a multicellular organism has
cells specialized to perform different functions that collectively support the
organism. As they grow and develop, they become highly organized and
specialized.
8
The different levels of biological organization are described and
arranged below from the highest to the lowest or in a descending order.
Table 1. The Levels of Biological Organization arranged from Highest to Lowest
Levels of
Biological
Organization
Biosphere
Ecosystem
Description
The part of the Earth that contains all
ecosystems
Community and its nonliving
surroundings
Community
Population
Organisms
Organ
Systems
Organs
Tissues
Cells
Population that live together in a
defined area
Group of organisms of one type that
live in the same area
The Individual living thing that is made
up of one or more organ systems
A group of organs performing similar
function
A group of tissues performing similar
function
A group of cells performing similar
function
The basic structural functional unit of
life
9
Illustration/
Example
What’s More
Directions: Use the description provided in your handout. Then classify
each picture into what level of organization it belongs. Write your answers
in your Science activity notebook.
2
1
4
3
6
5
a community or group of living
organisms that live in and interact with
each other in a specific environment
7
8
9
Population that live
together in a defined area
(Source:https://www.rcsdk12.org/cms/lib04/NY01001156/Centricity/Domain/3641/LevelsOfOrganization.pdf)
10
12
10
11
Group of organisms of one type
that live in the same area
14
13
15
14
The animal cell is an
example of a cell.
(Source:https://www.rcsdk12.org/cms/lib04/NY01001156/Centricity/Domain/3641/LevelsOfOrganization.pdf)
Excellent! You have successfully completed the activity. Let’s
try to check your performance through the rubrics below.
My Performance 
Score
Description
13-15
Advanced
10-12
Proficient
7-9
Approaching Proficient
4-6
Developing
0-3
Needs Improvement
11
What I Have Learned
Fill in the Blanks
Directions: Using what you have learned in this module, fill in the blanks
with the correct word/s from the word box below that will complete the
sentence. Write your answers in your Science activity notebook.
1. Organisms are characterized based on its organization. It follows an
order from lowest to highest,
_____1a_____
tissues
population
organs
____1c______
___1b____
ecosystem
organism
biosphere.
2. Each part of a/n __________ is necessary for survival. Whatever
happens to any of these parts affect the others.
3. __________ are group of tissues in a living organism that performs
similar function.
4. When many cells of the same kind are together in a group, it is
called __________.
5. __________ are group of organisms belonging to the same type that
live in the same area.
6. The __________ level of biological organization is called Biosphere.
Word Box
Highest
Population
Organ Systems
Lowest
Tissues
Organism
Community
Organs
Biosphere
12
What I Can Do
Activity 3: Sequencing: The Foldable Levels of Biological
Organization Pyramid
Directions: Make a Foldable Pyramid on the Levels of Biological
Organization. You will be guided with the procedure below.
1. Cut along the dotted line to make a foldable pyramid.
2. Tape the pyramid together by following the instructions.
3. Paste the levels of biological organization on one side with the
smallest at the top.
4. On the next side, you paste the description for the corresponding
level.
5. On the last side, you will paste examples of the levels.
Figure 3. Foldable Pyramid (Output)
(Note: Your foldable pyramid on the levels of biological organization should
look like figure 3. Be Creative and Have Fun!)
13
Cut this triangle off
Figure 4. Foldable Pyramid Template
14
Side 1
Side 2
Side 3
Cells
The basic structural and functional
unit of life.
Prokaryotes, White
blood cells, Epithelial
cells, Bacteria, Yeast
Tissues
A group of cells that work together
to perform a specific task.
Epithelial,
Connective, Nervous,
Muscle
Organs
A group of different tissues that
form a singular unit and perform a
similar function.
Heart, brain, kidney,
skin
Organ
systems
A group of organs that interact to
perform a similar function,
Circulatory system,
Digestive system,
Excretory system,
Organism
An individual living thing that can
be unicellular or multicellular.
Humans, Bird,
Earthworm, Plant,
Bacteria, Yeast
Population
All organisms of the same group or
species living in a particular
geographical area and capable of
interbreeding.
Hawks, barred owls,
and eagles on Davao
Community
An interacting group of various
species in a common location
Pond, Grassland,
Deep ocean, Forest
of trees and
undergrowth, Plants
inhabited by animals
and rooted in soil
containing bacteria
and fungi
Ecosystem
It contains all the communities that
interact in a specific area.
Deciduous forest,
Coniferous forest,
Biosphere
It is made up of all parts of the
Earth where life exists.
Earth, where life
exists
(Note: The teacher shall provide the activity worksheet.)
Remarkable! You have created your own foldable pyramid on
the levels of biological organization.
15
Assessment
Directions. Choose the letter of the correct answer. Write the letter of your
answers in your Science activity notebook.
1. Which of the following is the simplest level of ecological
organization?
A. A population
B. A community
C. An ecosystem
D. An individual or species
2. The organ systems of plants consist of the root and shoot systems.
Why is it important for these organ systems to work together?
A. To grow and survive
B. To avoid pests and other animals
C. To avoid floods and strong winds
D. To survive droughts and earthquakes
3. Which of the following differentiates organs from tissues?
A. Organs and tissues are made up of cells.
B. Organs and tissues make up an organ system.
C. Organs make up organ system; cells make up tissues.
D. Organs make up organ system; tissues make up organs.
4. What level of biological organization is made up of a group of similar
cells that perform a specific function?
A. Organ
B. Organism
C. System
D. Tissue
16
5. At which smallest level of organization in an organism can the
characteristics of life be carried out?
A. Cell
B. Organ
C. Organ System
D. Tissues
6. Which of the following DOES NOT belong to the group?
A. Eyes
B. Large Intestine
C. Mouth
D. Stomach
For Item number 7, refer to the image below.
7. To which level of biological organization does the
picture belong?
A. Cell
B. Organ
C. Organism
D. Organism
8. Which of the following is a population?
A. Mountain stream
B. All the frogs in a pond
C. Hawks, barred owls, and eagles on Davao
D. Blue-tailed skinks (lizards) and snakes around a barn
9. What level of biological organization is being referred to when many
organ systems work together?
A. Cells
B. Organ
C. Organism
D. Organ System
17
10. What is formed by a group of cells and tissues that work together to
carry out a specific function?
A. Cell
B. Organism
C. Organ System
D. Organ
11. How do you call a group of same species living together?
A. Biome
B. Community
C. Ecosystem
D. Population
12. Which is the correct sequence – from the lowest to highest– of the
levels of organization in an organism?
A. Cells
Tissues
Organisms
Organs
Population
Organ systems
Community
Ecosystem
Biosphere
B. Cells
Tissues
Organisms
Organs
Community
Organ systems
Population
Ecosystem
Biosphere
C. Cells
Organs
Organisms
Tissues
Population
Organ systems
Community
Ecosystem
Biosphere
D. Cells
Tissues
Organisms
Organs systems
Population
Community
Organ
Ecosystem
Biosphere .
13. Which of the following units is the highest level of biological system?
A. Biosphere
B. Community
C. Ecosystem
D. Population
18
14. Which of the following statements is TRUE?
A. Groups of organs working together are called cells.
B. Groups of cells working together are called tissues.
C. Groups of organs working together are called organisms.
D. Groups of tissues working together are called organ systems.
15. How do you call the collection of organisms that belong to different
populations but all live in the same area and interact with one
another?
A. Community
B. Ecosphere
C. Ecosystem
D. Population
19
Additional Activities
Activity 4: What’s the Word? That’s the Word!
Directions: Find and encircle the vocabulary words in the grid. Look for
them in all directions including backwards and diagonal. The first one is
done for you. Write your answers in your Science activity notebook.
B
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Congratulations! You have successfully completed Module 2.
Please proceed to Module 3A and learn about Cell Parts and
Functions.
20
Answer Key
21
References
Books
Alvie J. Asuncion, et. al. 2017. Science 7 Learner's Material. FEP Printing
Corporation.
Ma. Eloisa Bermio, et. al. 2003. Science and Technology for the Modern World.
Diwa Scholastic Press Inc. .
Education, Department of Education - Bureau of Secondary. n.d. Project EASE
(The Levels of Biological Organization).
Internet Sources
AP Environmental Science. https://sites.google.com/site/
apenviornmentalscience/the-living-world (accessed June 05, 2020).
BiologyWise.https://biologywise.com/levels-of-organization-of-livingthings.( accessed May 28, 2020).
eSchoolToday.http://eschooltoday.com/our-ecosystems/levels-oforganisation-in-an-ecosystem.html. (accessed June 05, 2020).
https://www.nios.ac.in/media/documents/333courseE/4.pdf (accessed May
28, 2020).
Levels of Biological Organization. https://reviewgamezone.com/mc
/candidate/test/?test_id=18878&title=Levels%20Of%20Organization.
( accessed June 17, 2020).
National Geographic. https://www.nationalgeographic.org
/encyclopedia/unicellular-vs-multicellular/.( accessed June 09, 2020).
Pinterest. https://www.pinterest.ph/pin/574560864951792212 (accessed
May 29, 2020).
Quizizz.https://quizizz.com/admin/quiz/57339a91003297a8b43fdae6/levelsof-ecological-organization. (accessed June 05, 2020).
Quizlet. https://quizlet.com/110578766/cardiac-muscle-tissue-flash-cards/.
(accessed May 27, 2020).
School Tutoring Academy. 2017. https://schooltutoring.com/help/biologylevels-of-organisation/( Accessed June 19, 2020).
22
For inquiries or feedback, please write or call:
Department of Education – Region 10
Zone 1, DepEd Building Masterson Avenue, Upper Balulang
Cagayan de Oro City, 9000
Telefax: (088) 880 7072
E-mail Address: region10@deped.govph