A Sample Strategic Intervention Material about the gymnosperms.

1. LORELYN A. COSEP

2. LORELYN A. COSEP

3. TableofContents
Objective 3
Title Card 4
Guide Card 1 8
Guide Card 2 12
Activity Card 1 16
Activity Card 2 17
Activity Card 3 18
Activity Card 4 19
Assessment Card 1 20
Assessment Card 2 23
Enrichment Card 1 24
Enrichment Card 2 25
Reference Card 27
Answer Key 28
Acknowledgement

4. Main Task:
Distinguish how spore
bearing and cone-
bearing plants reproduce
(SGMT-IIg-f-4)
Sub Tasks:
 Describe the characteristic of
cone-bearing plants
 Identify the reproductive parts
of cone-bearing plants
 Describe the function of each
part

6. Whew! This fast few weeks
was so stressful. I really need
to have a break and go to a
place where I can relax.
Hmmm..?? I’ve heard that
there are a lot of beautiful
places in Davao. Can you
help me choose?
Primo’s thought…

8. Primo’s thought… Hmm… I think I know where to go.
I want a place where I feel like I’m in
Baguio City, the City of Pines. I’ve
heard there are various pines growing
in Eden Nature Park at Eden
Bayabas, Toril, Davap City. I want
to know how these plants reproduce?
Do you also want to know how?
Hmm, if George is here am sure she
will also be excited to discover too.
Come, let’s go to the place and learn
the how’s of this plant.

9. GUIDE CARD 1
Flowers are often the showiest part of most plants, but their
main function is facilitating reproduction through seeds. However, there
are many plants out there which never produce flowers. They are called
gymnosperms, from the Greek words gymno (which means naked) and
sperma (seed). Conifers are one of its examples. These plants produce
seeds in cones. Their seeds are “naked seeds”; they are not covered with
fruits. Most conifers are trees and shrubs with leaves like needles. They
also generally prefer low temperature. Thus, they are abundant in
temperature regions and at high elevations in warmer countries like in
Baguio City, Bukidnon, and some other high mountains. Pine trees are
one of the examples of conifers. Another common examples are cedars,
spruces, yews, pines, redwoods, cypresses, firs, and junipers.

10. Cone Bearing Examples:
CYPRESS
BLUE SPRUCE
PINE TREE

11. Cone Bearing Examples:
CALIFORNIA RED WOOD
CEDAR FIRS

12. Wow! That was a tough
information about the
cone-bearing plants.
Now I know its
characteristics. But wait,
how did they
reproduce?
Primo’s reaction…

13. GUIDE CARD 2
Cone-bearing plants: Reproduction
The reproductive structure of conifers develops
in cones. Most conifers have male and female cones
on different branches of the same tree or shrub.
Conifers have two kinds of cones- pollen cone and
seed cone. A pollen cone is a male cone that makes
pollen grains. The pollen spreads through the air. The
seed cone is a female cone that produces egg cell.
Now, take a look on the life cycle of a cone bearing
plant.

14. “The Hows of the naked
Seed”
Male
Cone
Female
Cone
Seed
Pollen + Egg
Cone-bearing plants have two
types of cones: female cones
and male cones. Reproduction
begins when one of the pollen
grains from inside a pollen sac
on the male cone floats through
the air to the scale of a female
cone. A pollen tube then grows
from the pollen grain toward
the female ovule. Sperm cells
move through the pollen tube
and one of them fertilizes an
egg cell, which then develops
into a seed. The winged seed
floats to the ground and begins
to germinate. As the top of the
seedling reaches for light, the
hypocotyl straightens and the
cotyledons spread out.A hypocotyl is a germinating seedling's stem,
normally found underneath the seed leaves but
above the root.

15. Wow! that’s awesome. So the
growth of these types of plant
is just like a cycle. It’s a
repetitive sequence of events. I
really liked this vacation. I did
not only enjoy but I also
learned a lot. Hmmm.. I’m so
excited to share my learnings
to George. I’m sure she’ll love
to hear all about cone bearing
plants. Oh, wait, do you like to
play? I have here a treasure
box. Let us see what’s inside.
Primo’s reaction…

17. Directions: Put check (/) if the following statements are
characteristics of cone bearing plants and if not.
______1. These plants produce flowers.
______2. These plants produce seeds in cones.
______3. Most of these plants are trees and shrubs with
leaves like needles.
______4. These are seedless plants.
______5. These plants are abundant in temperature regions
and at high elevations in warmer countries.
ACTIVITY CARD 1

18. Directions: Arrange the following letters to form the reproductive parts
of the cone bearing plants.
1. D E S E N E O C - female cone that produces an egg cell.
2. V U O L E - develop into a seed after fertilization
3. O P H Y O C L T Y - is a germinating seedling's stem,
normally found underneath the seed
leaves but above the root.
4. E N L L O P N E O C - male cone that makes pollen grains.
5. G E E L L E C - produces by the female cone.
ACTIVITY CARD 2

19. Directions: Form the life cycle of the cone bearing plants using the
letters. Write the correct order inside the box.
ACTIVITY CARD 3

20. “The How’s of the Naked Seeds”
“The Hows of the Naked Seeds”
Directions. Arrange the following statements in chronological order that
show how the cone bearing plant reproduce. Write 1 to 5 on the space
provided.
_______A pollen tube then grows from the pollen grain toward the
female ovule.
_______The winged seed floats to the ground and begins to germinate.
_______As the top of the seedling reaches for light, the hypocotyl
straightens and the cotyledons spread out.
_______One of the pollen grains from inside a pollen sac on the male
cone floats through the air to the scale of a female cone.
_______Sperm cells move through the pollen tube and one of them
fertilizes an egg cell, which then develops into a seed.
ACTIVITY CARD 4

21. Directions: Encircle the letter of the correct answer.
1. What is produced in cones of gymnosperms?
a. Ovary
b. Pollen
c. Seeds
d. Spores
2. Which statement proves that pine trees are gymnosperms? Pine trees______.
a. grow tall.
b. grow in cold climate
c. have needle-like leaves.
d. are cone-bearing plants.
3. How do cone-bearing plants reproduce?
I. During pollination, they must contain large anthers and have a reduced amount of leaves.
II. During Pollination the seeds sprout rapidly
III. The spores produce more seeds until it mature.
IV. During day weather, pieces of seeds are scattered by the winds. They sprout and later grow into plant.
a. I only c. II and III
b. I and II d. I, II and IV
4. One of the plants below has the following characteristics:
I. Has roots, stems, and leaves.
II. Has conducting tubes.
III. Has naked seeds.
IV. Bears cones.
Which one is it?
ASSESSMENT CARD 1
a c db

22. ASSESSMENT CARD 1
5. Which is the first step in the fertilization process of cone-bearing plants?
a. Pollination
b. The growth of fruit
c. A tube grows to the pistil
d. The sperm joins with the egg
6. Why conifers are called “naked seeds”?
a. Are covered with fruits.
b. Not covered with fruit
c. Grow in leaves
d. Are attached to their fruit
7. How are seeds of the conifer dispersed?
a. by floating on the water of streams and rivers
b. by producing fruit
c. they are winged and float in the wind
d. they are carried by the insects
8. Which of the given statements proves conifers are gymnosperms?
I- They are non-flowering plants.
II- They use seeds to reproduce.
III- Their seeds have no covering
IV- Their seeds have thick coning.
a. I only c. I, II, and III
b. I and II d. I, II, III and IV

23. ASSESSMENT CARD 1
9. Which of the following group of plants are cone-bearing?
I. Cedar, Pine and Spruce Trees
II. Fern, Moss, Cedar
III. Cypress, redwoods, pine
IV. Strawberries, liverworts, Ferns
a. I and II c. II and III
b. I and III d. III and IV
10. What would result if conifer pollen grains landed near the opening of an ovule?
a. Formation of embryo
b. Pollination occurs
c. Produces an egg cell
d. Into a new plant
Good luck
& Go for
it!

24. ASSESSMENT CARD 2
How well did you learn?
Directions: Read the paragraph about Baguio City. Find out why the city is known as the Summer Capital and the City of
Pines. After which, inside the box below the picture, write at least 5 characteristics that describe the conifer, the pine trees.
Good luck
Baguio City, which is perched on high elevation, is known as the “Summer Capital” of the Philippines
because of its cold weather. The original blueprint of the city was made by American architect Daniel Burnham (which is
the reason why the main park at the heart of the city is known as Burnham Park). It’s also known as the “City of Pines”
because, well, pine trees dominate the landscape.
Excerpt from http://visitpinas.com/baguio-summer-capital-of-the-philippines/
(Write your answers here))

25. ENRICHMENT CARD 1
Agree or disagree?
Directions: Read each statement. Check AGREE if the sentence describes the cone bearing
plants if not check DISAGREE and state your reason on the third column. Are you ready?
Statement Agree Disagree If disagree, explain
why.
Example: Conifers are
angiosperms.
/ Conifers are
gymnosperms.
1. The reproductive structure of
conifers develops in cones.
2. When conifer pollen grains land
near the opening of an ovule,
pollination occurs.
3. Pines and ferns are some of the
examples of cone-bearing plants.
4. The primary pollinator of
conifers is insects.
5. The pollen cone is a female
cone that produces egg cell.

26. ENRICHMENT CARD 2
“My Perfect Pine Tree”
When Abi visited the City of Pines, Baguio City, she was amazed
with the beautiful scenery of the place most especially with the tall,
evergreen pines. While riding on her car, she wondered how these pine
trees grow. So since you learned a lot from our previous activities, do
you want to help Abi find the answer to her question? Are you ready?
Directions: Below is the picture of a pine tree. Help Abi complete the
cycle by arranging the pictures before it became a perfect pine tree.
Ready?

27. ENRICHMENT CARD 2
“My Perfect Pine Tree”

28. REFERENCE CARD
APOLINARIO, N. et. al. The New Science Links Worktext in Science and Technology. Revised
Edition. REX Book Store. Copyright 2017
http://www.theplantlist.org/browse/G/
https://www.britannica.com/plant/conifer
http://bcs.whfreeman.com/webpub/Ektron/Hillis%20Principles%20of%20Life2e/Animated%20T
utorials/pol2e_at_2102_Life_Cycle_of_a_Conifer/pol2e_at_2102_Life_Cycle_of_a_Conifer.html
http://visitpinas.com/baguio-summer-capital-of-the-philippines/

29. ANSWER KEY
Activity Card 1
1. x
2. /
3. /
4. x
5. /
Activity Card 2
1. Seed cone
2. ovule
3. hypocotyl
4. Pollen cone
5. Egg cell
Activity Card 3
B-D C- A
Activity Card 4
2-4-5-1-3

30. ANSWER KEY
Assessment 1
1. B
2. D
3. D
4. A
5. A
6. B
7. C
8. C
9. B
10. b
Assessment Card 2
Characteristics of cone-bearing plants
 Non-flowering plants
 Use seeds to reproduce
 Seeds have no covering
 Seeds are dispersed with the aid of the
wind
 Needle- like leaves
 Bears cones
 Abundant in temperature regions and at
high elevations in warmer countries

31. ANSWER KEY
Enrichment Card 1
1. Agree
2. Agree
3. Disagree, ferns are
spore-bearing plants
4. Disagree, it is the
wind.
5. Disagree, it’s the
seed cone. Pollen
cone is a male cone.
Enrichment Card 2

32. The Challenge…
Good job! You did your best. See you on
the next level about Spore – bearing
plants.