GRADE
4
Science Activity Sheet
Quarter 2 – MELC 4
Week 3
Specialized Structures of
Terrestrial and Aquatic Plants
REGION VI – WESTERN VISAYAS
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Science 4
Activity Sheet No. 4- Specialized Structures of terrestrial and aquatic Plants
First Edition, 2020
Published in the Philippines
By the Department of Education
Region 6 – Western Visayas
Republic Act 8293, section 176 states that: No copyright shall subsist in any
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This Learning Activity Sheet is developed by DepEd Region 6 – Western
Visayas.
ALL RIGHTS RESERVED. No part of this learning resource may be
reproduced or transmitted in any form or by any means electronic or mechanical
without written permission from the DepEd Regional Office 6 – Western Visayas.
Development Team of Science Activity Sheet
Writer:
NELDA G. TUMBOKON
Content and Language Editing:
Dr. MARY CHERRY LYNN M. DALIPE
ALVIN F. ISIDRO
MARK KYNAN R. LOVERAS
Division of Aklan Management Team:
MIGUEL MAC D. APOSIN,
JOSE NIRO R. NILLASCA,
DOBIE P. PAROHINOG,
MARY CHERRY LYNN M. DALIPE,
MAHNNIE Q. TOLENTINO
Regional Management Team
MA. GEMMA M. LEDESMA,
JOSILYN S. SOLANA,
ELENA P. GONZAGA
DONALD T. GENINE,
ROVEL R. SALCEDO,
MOONYEEN C. RIVERA,
ANITA S. GUBALANE,
MINDA L. SOLDEVILLA,
DAISY L. LOPEZ,
JOSEPH M. PAGALARAN
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Introductory Message
Welcome to Science 4!
The Learning Activity Sheet is a product of the collaborative efforts of the
Schools Division of Aklan and DepEd Regional Office VI - Western Visayas through
the Curriculum and Learning Management Division (CLMD). This is developed to
guide the learning facilitators (teachers, parents and responsible adults) in helping the
learners meet the standards set by the K to 12 Basic Education Curriculum.
The Learning Activity Sheet is self-directed instructional materials aimed to
guide the learners in accomplishing activities at their own pace and time using the
contextualized resources in the community. This will also assist the learners in
acquiring the lifelong learning skills, knowledge and attitudes for productivity and
employment.
For learning facilitator:
The Science 4 Activity Sheet will help you facilitate the leaching-learning
activities specified in each Most Essential Learning Competency (MELC) with minimal
or no face-to-face encounter between you and learner. This will be made available to
the learners with the references/links to ease the independent learning.
For the learner:
The Science 4 Activity Sheet is developed to help you continue learning even
if you are not in school. This learning material provides you with meaningful and
engaging activities for independent learning. Being an active learner, carefully read
and understand the instructions then perform the activities and answer the
assessments. This will be returned to your facilitator on the agreed schedule.
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Name of Learner: ___________________________________________
Grade and Section: _____________________Date: _______________
Science 4 Activity Sheets No. 4
Specialized Structures of Terrestrial and Aquatic Plants
I. Learning Competency with Code
Identify the specialized structures of terrestrial and aquatic plants
S4LT -Ile-f-9
II. Background Information for Learners
Terrestrial plants are plants that grow on land. Some terrestrial
plants are small, others are big. There are plants with big trunks while
others have soft stem. Other plants bear flowers while others do not.
Terrestrial plants also grow in different places. There are plants that
grow directly on the soil while others grow on rocks. Other plants cling
to the fence while the greatest number of plants are found in the field.
Plants living in different places are exposed to varied conditions and
have structures suited to their particular needs. For example, forest
plants tend to grow tall and sturdy. Shapes and sizes of the leaves are
also important for survival. Plants with waxy leaves help to protect
themselves from dehydration as a result of too much exposure to the
sunlight.
Aquatic plants are plants that have adapted to living within
aquatic environments. These plants require special adaptative
structure for them to live submerged in water or at the water’s surface.
Some of the aquatic plants bear flowers and they becoming more
popular that many gardeners are turning their attention to the area of
water gardening. A pond or garden with flowers will give you peace and
relief after a day.
There are different plants with specialized structures in order to
adapt to their environment and to protect themselves from harm.
Thorns and hairs are some of the specialized structures of plants, but
not all plants have thorns and hairs.
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The table below are the examples of the specialized structures
of terrestrial and aquatic plants.
Specialized
Structure
Characteristics/ Functions
Example
Rose
Thorns
• A sharp pointed modified stem.
• A stiff, sharp-pointed, straight or
curved woody projection on the
stem or other part of a plant.
• It protects the plants against
herbivores or animals that may
eat them.
“The Crown
of Thorns”
Waterstoring
branches
and stems
• The sticky sap produced is
somewhat toxic and known to be
a skin and eye irritant.
• This is known to be toxic to
humans, cats, dog, horses, and
sheep.
Euphorbia
Bougainvillea
• Are modified or specialized Cactus
Spines
leaves that look like needles.
• The spines protect plants from
their enemies.
Toxic Liquid • The toxic liquid on its hair can
Lipang aso
on hairs
penetrate the skin and cause
stinging sensation or irritation.
• Plants with foul smelling fruits or Marang
Strong odor
leaves can protect themselves
and thornfrom being eaten because of the
covered rind
pungent smell.
• Its thorn-covered rind also acts as Durian
their
protection
from
their
enemies.
Sharp leaf
• The course, erect and sharp leaf Talahib or
are means of protection of some cogon
plants to prevent their leaves of
being eaten.
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Specialized
Structure
Specialized Structures
• Their resemblance to birds could
Brightly
cast other insects away because
colored
they may think that the plants are
flowers with
group of birds. This will protect
resemblance
them from the attack of many
to tropical
insects.
bird
Flowers with • The unpleasant smell of flowers
unpleasant
attract flies to pollinate but protect
smell
the plants from being eaten by
animals
Thick and • The big leaves float on the water’s
buoyant
surface to attract ample sunlight.
leaves
• The top side of the leaf is covered
with a cuticle to keep it as dry as
possible
• The underside of the leaf has
thorns
to
protect
against
predators.
Long Roots • Aquatic plants have long roots
that can reach the soil under
water
• It absorbs fish waste, ammonia
and other dirt making the water
healthy for the fish.
• It also absorbs a lot of oxygen
from water serving as a good
aeration system.
Flat and
• The stem and surfaces are
Broad
coated with a wax which is very
Leaves
difficult to wet.
• The broad leaves enable them to
capture sunlight and to float.
Airspaces
• Some aquatic plants
have air spaces to help it stay
afloat in the water. quicker and
be a productive food sources for
many animals.
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Example
Bird of
Paradise
Kalumpang tree
Water Lily
Hyacinth
Lotus
Duckweed
III. Accompanying DepEd Textbook
Department of Education. (2015). K-12 Basic Education Curriculum,
Science 4 Learners Material (pp. 60-94). Pasig City, Philippines
IV. Activity Proper
Read pages 117-118 Terrestrial Plants and pages 120 and
123 for Aquatic Plants and answer the following exercises.
A. Direction: Write TP for the terrestrial plants and AP for aquatic
plants
_________1. Rose
_________6. Duckweeds
_________2. Hyacinth
_________ 7. Lipang aso
(Andalamay)
_________3. Lotus
_________8. Talahib or
cogon
_________4. Durian
_________ 9. Water lily
_________5. Euphorbia
________ 10.Cactus
B. Match plants in Column A with their specialized structure in
Column B. Write the letters only.
Column A
_______1. Cactus
_______2. Durian
_______3. Lotus
_______4. Kalumpang tree
_______5. Hyacinth
_______6. Bird of Paradise
_______7. Water Lily
_______8. Talahib or cogon
_______9. Duckweeds
_______10. Rose
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Column B
A. stems have thorns
B. has air spaces to help it
stay afloat in the water
C. sharp leaves
D. leaves are thick and
buoyant
E. flowers are brightly colored
and resemble like birds
F. long roots that reach under
the water
G. unpleasant smell of a
flower
H. leaves are flat and broad
I. fruits covered with thorn
and has pungent odor
J. leaves looks like needles
C. Multiple Choice: Read the questions carefully and encircle
the letter of the correct answer.
1. What specialized structure is common to rose and euphorbia?
A. Both have stinging hairs
C. Both have thorny
stems
B. Both have sticky leaves
D. Both have fibrous fruits
2. Which of the following plants has hair on its stem?
A. San Francisco
B. Santol
C. Mayana
aso
3. Which of the following plants lives in water?
A. Lotus
B. Sampaguita C. Santol
D. Lipang
D. Durian
4. What are the characteristics of water lily leaves which are
different from hyacinth and lotus?
A. They have long stem and big leaves.
B. They have thick and buoyant leaves.
C. They have long roots.
D. They have beautiful flowers.
5. Which of the following plants have spines that look likes needles?
A. Durian
B. Cactus
C. Lotus
D. Marang
Guide Questions
1. Why do you think those specialized structures are important to
plants?
____________________________________________________
____________________________________________________
2. What will happen if aquatic plants are planted in soil and
terrestrial plants are placed in the ponds?
____________________________________________________
____________________________________________________
3. Your house is near the pond with so many aquatic plants. As a
pupil, how can you help protect the aquatic plants?
____________________________________________________
____________________________________________________
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V. Reflection
Complete the statements below.
I understand
_____________________________________________________
_____________________________________________________
I don’t understand
_____________________________________________________
_____________________________________________________
I need more information about
_____________________________________________________
_____________________________________________________
VI. Links and/or Other References
https://plantcaretoday.com/crown-of-thorns-plant-poisonous.html
https://medicinalplantsdatabase.com/portfolio/kalumpang/
VII. Answer Key
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