Download SCIENCE 4 – 3rd Term UT1 REVIEWER MODIFIED TRUE OR

SCIENCE 4 – 3rd Term UT1 REVIEWER
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MODIFIED TRUE OR FALSE. Write T beside the number if the sentence is true. If it is false, replace the
underlined word to make the statement correct.
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Plants need light energy, water and oxygen to live.
Chlorophyll, the green pigment of a plant, traps light energy from the sun.
Phloem carries water from the roots to the stems of a plant.
Xylem carries nutrients from the stem to the different parts of the plant.
Photosynthesis happens inside chloroplasts, the specialized organelles that are found in plant
cells.
Stomata consist of four guard cells that allow gases to move in and out of the plant.
Green plants are called heterotrophs because they use light energy from the sun to produce
the food they need.
Most of the water absorption is carried out by the younger part of the roots called root hairs.
Since the water concentration outside the root is greater than that inside the root, water in
the soil spaces is taken into the root hairs by the process of osmosis.
The upward movement of water through the stems and leaves happens through capillary
action.
Water molecules are attracted and held together by the forces of adhesion and surface
tension.
Water molecules attach themselves to the molecules of the xylem tube because of cohesion.
Photosynthesis means “putting together with light”.
Cohesion is the attractive force that binds liquid to another substance.
The process of photosynthesis produces sugar and carbon dioxide.
IDENTIFICATION. Fill in the blanks with the appropriate word or phrase.
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The part of a plant that contains its reproductive structures is the_ ________.
The female part of a flower is the ____________.
The filament and anther make up a flower’s male part, the ___________.
Flowers containing either the stamen or the pistil are called ____________ flowers, while flowers that
contain both the stamen and pistil are called __________ flowers.
5. The two key processes in the sexual reproduction of plants are __________ and ____________.
6. _____________ is the transfer of pollen from the anther of the stamen to the stigma of the pistil of the
same flower or another flower in the same plant.
7. _____________ is the transfer of pollen from the anther of a flower in a plant to the pistil of a flower in
another plant of the same kind.
8. Agents of pollination include _________, __________, __________ and ________________.
9. Plants can reproduce asexually through their ________, __________ and leaves.
10. Some plants have stems that grow underground. At first glance, they do not look like stems, but on closer
look, one will find nodes, like all other stems. These stems are called _____________.
11. Plants like turnip, carrot, radish and sweet potato have ________ ______ that contain food. When
planted, these grow into new plants.
12. Katakataka is a plant that reproduces by means of its ___________.
13. Strawberry and Bermuda grass are examples of ________ or _________, which are stems that grow
horizontally above the ground along the surface. When a node touches the ground, roots and leaves
develop.
14. ___________ in plants occurs when a sperm from the pollen tube unites with an egg cell inside the ovule.
15. A fertilized ovule develops into a seed, while a mature ovary develops into a _________ that protects the
seed.
III. MULTIPLE CHOICE
1.
What are the advantages of vegetative propagation over sexual reproduction?
a. Plants are produced more quickly.
b. Plant varieties are improved.
c. Both a and b
d. None of the above
2.
To produce new plants through this method, a branch that grows near the ground is bent and covered
with soil. The parts of the branch covered with soil will grow roots and new shoots. The new plants are
then cut away from the parent plant and placed in another area. What is it?
a. Stem cutting
b. Layering
c. Air Layering
3.
Transplanting a branch of one plant to the trunk of another plant is called __________.
a. Budding
b. Grafting
c. Stock and Scion
4.
With this method of propagation, a part of the plant’s bark is removed, and the exposed area is covered
with peat moss and plastic. After the roots grow in the covered area, the branch is cut off and
transplanted. What is it called?
a. Stem Cutting
b. Layering
c. Air Layering
5.
Which of these is a modified stem?
a. Bulb
b. Tuber
c. Rhizome
d. Runner
e. All of the above
f. None of the above
6.
This is an animal that does not have head, arms and internal organs. It attaches to objects like rocks and
plans under the water. It has many pores. It commonly reproduces asexually and can regenerate its lost
body parts. What invertebrate is described?
a. Mollusk
b.
c.
d.
7.
Echinoderm
Sponge
Cnidarian
This invertebrate is an aquatic animal with a soft body shaped like a vase, bell or umbrella. It reproduces
asexually. What is it?
a. Mollusk
b. Echinoderm
c. Sponge
d. Cnidarian
8.
Which of these invertebrates is not an Arthropod?
a. Spider
b. Shrimp
c. Squid
d. Scorpion
e. Centipede
9.
Which of these descriptions is not true of all Echinoderms?
a. Have spiny skin
b. Have tube feet
c. Have mouth surrounded with tentacles or arms
d. Reproduce by regeneration
e. Have segmented bodies
10. Which of these do not have an exoskeleton, segmented bodies and jointed legs?
a. Arachnids
b. Crustaceans
c. Insects
d. Worms
IV. ENUMERATION / ESSAY
1.
Describe briefly each of the four (4) forms of asexual reproduction
1. Budding -___________________________________________________________________________
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2. Gemmule Formation -_________________________________________________________________
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3. Fragmentation - _____________________________________________________________________
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4. Regeneration -_______________________________________________________________________
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2.
Describe the main difference of oviparous animals and viviparous animals.
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