3rd Science Exam

MARANTAO KALUMBAYAN CHANGMAKERS
SCIENCE
BIOLOGY No. 1
1. The most abundant substance in the protoplasm is _______.

a. Fat b. protein c. carbohydrate d. water
2. The site of the majority of photosynthesis in a leaf is the _____.

a. Spongy layer b. cuticle c. epidermis d. palisade layer
3. Which of the following statements is illustrated by the graph beside?

a. As the temperature is lowered, the rate of activity of enzymes decreases. As the temperature is
raised, their activity increases, until a maximum is reached at about 40oC.
b. As the temperature is raised, the rate of activity of enzymes decreases. As the temperature is
lowered, their activity increases until a maximum is reached at about 40oC.
c. As the temperature is lowered, the rate of activity of enzymes increases. As the temperature is raised,
their activity decreases, until a maximum is reached at about 40oC.s
d. The level of activity of enzymes remains constant even if temperature changes. Likewise,
temperature remains constant even if the level of activity increases.
4. Muscle may be controlled or may work without conscious thought. The muscle type(s) considered
involuntary is (are) ______.
a. Smooth b. skeletal c. skeletal and cardiac d. cardiac and smooth
5. Meiosis differs from mitosis in that ______.

a. Meiosis produces 4 daughter cells, while mitosis produces only 2 daughter cells.
b. The chromosome number remains the same in meiosis, but is halved during mitosis.
c. Meiosis produces identical daughter cells, but mitosis produces daughter cells that are genetically
different.
d. Meiosis occurs in somatic cells, while mitosis occurs in sex cells.
6. A root may perform all of the following functions except _______.

a. Anchorage b. absorption of water c. photosynthesis d. storage
7. Which of the following is an example of a biotic factor that will determine which animals or plants inhabit
an environment?
a. The acidity of a lake near a factory.
b. The high daytime temperatures and low night time temperature
c. Berry plants growing in abundance at the edge of a forest
d. The amount of oxygen present in the water or a pond.
8. Which of the following is the best description of the pyramid of energy?

a. The base of the pyramid consists of producers which supply the most energy
b. The base of the pyramid consists of the highest consumers who need the most energy
c. The top of the pyramid consists of the producers which supply the most energy
d. The top of the pyramid consists of the highest consumers who need the most energy
9. The breathing rate is increased by an increase in the content of ________.

a. Oxygen b. nitrogen c. CO2 d. H2O (vapor)
10. That evolution has occurred is now generally accepted as a doctrine rather than a theory because
a. There is ample evidence that species have changed over the year
b. Darwin received a posthumous Nobel Prize for his book on natural selection
c. Uranium-lead studies have traced the history of the horse
d. It is now certain that the earth is at least 4B years old.
11. Of the following terms, which one includes the others?

a. Class b. order c. phylum d. family
12. A protozoan causes the disease malaria in a human host. This relationship illustrates
a. Mutualism b. Commensalism c. Parasitism d. Predation
13. Viruses are not considered free-living because
a. Their cells lack cytoplasm.
b. Their cells contain DNA.
c. They are too small to be seen by light microscopy.
d. They cannot reproduce outside a living cell
14. Some organisms living in a garden include dragonflies, bugs, roses, grasshoppers, grasses, worms, and
spiders. Collectively, these organisms represent a __________.
a. Biome b. Community c. Habitat d. Population
15. Green algae are able to manufacture their own food because _________.
a. They live in water.
b. They attach themselves to plants.
c. They have chlorophyll.
d. They are the most immediate relatives of green plants.
16. All of the following are examples of a reflex except __________.

a. Sneezing b. Blinking c. Coughing d. Reading
17. Which of the following is a disease caused by bacteria?

a. Polio b. Smallpox c. Rabies d. Tetanus
18. The greenhouse effect is caused by the increase in the _____.

a. Number of green houses c. Amount of CO2 in the air
b. Number of green plants worldwide d. Amount of O2 in the atmosphere
19. In binomial nomenclature scheme, only ______ and ______ are used to name an organism.
a. Genus and Species c. class and order
b. Kingdom and phylum d. family ad genus
20. Any biological agent that causes disease is called _____.

a. Host b. bacteria c. pathogen d. mushroom
21. Which bacteria is globular-shaped?

a. Bacillus b. coccus c. spirochetes d. AOT
22. Water is transported from the roots to the leaves by _____.

a. Phloem b. xylem c. sieve tubes d. bark
23. It refers to the arrangement of the veins in the leaf.

a. Venation b. Coloration c. Separation d. Adaptation
24. Trees that lose all their leaves at the end of a growing season in temperature regions are called _____.
a. Savannah b. Tundra c. Coniferous d. Deciduous
25. The growth of plants toward light is called
a. Hydrotropism b. geotropism c. Phototropism d. Negative tropism
26. Fluke: Class Trematoda :: Tapeworm: Class _____.

a. Cestoda b. Nematoda c. Annelida d. Rotifera
27. The process of shedding exoskeleton is called ______.

a. Melting b. Chitin c. Molting d. Metamorphosis
28. _______ is a term used to describe methods of introducing new genes into an organism.
a. Genetic eng’r b. recombinant DNA c. Hybridization d. Genetics
29. _______ is the process of bone formation.

a. Oogenesis b. ossification c. peristalsis d. Phagoaxtosis
30. An excretory organ that filters the waste from the blood.
a. Kidney b. Liver c. Stomach d. Intestine

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MARANTAO KALUMBAYAN CHANGMAKERS

1. The most abundant substance in the protoplasm is _______.

2. The site of the majority of photosynthesis in a leaf is the _____.

3. Which of the following statements is illustrated by the graph beside?

5. Meiosis differs from mitosis in that ______.

6. A root may perform all of the following functions except _______.

8. Which of the following is the best description of the pyramid of energy?

9. The breathing rate is increased by an increase in the content of ________.

11. Of the following terms, which one includes the others?

16. All of the following are examples of a reflex except __________.

17. Which of the following is a disease caused by bacteria?

18. The greenhouse effect is caused by the increase in the _____.

20. Any biological agent that causes disease is called _____.

21. Which bacteria is globular-shaped?

22. Water is transported from the roots to the leaves by _____.

23. It refers to the arrangement of the veins in the leaf.

26. Fluke: Class Trematoda :: Tapeworm: Class _____.

27. The process of shedding exoskeleton is called ______.

29. _______ is the process of bone formation.

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