Choice: Write the letter of the correct answer on the space provided.

1. The heart pumps blood that carries oxygen and nutrients to the different parts of the body. To which organ system
does the heart belong?

A. circulatory
B. digestive
C. excretory
D. reproductive

2. Each part of an organ system plays a specific function. which of the following structures does not much it's function

A. Eyes: sight
B. Heart: circulation
C. Kidneys: respiration
D. stomach: digestion

3. Which is the correct sequence-from biggest to smallest-of the levels of organization in an organism?

A. Cell> organ> organ system > tissue
B. Organ> organ system> tissue > cell
C. tissue>cell>organ>organ system
D. organ system> organ >tissue > cell

4. Which of the Heart following is an organ of the circulatory system?

A. heart
B. kidney
C. roots
D. stem

5. Plants also have organ systems. Which plant organ DOES NOT belong to the shoot system?

A. Flower
B. leaf
C. root
D. stem

6. A muscular organ about the size of your fist that pumps and circulates blood to the different parts of the body.

A. Heart
B. Kidney
C. Lungs
D. stomach

7. How do plants benefit from their root system?

A. They obtain water and nutrients from the soil

B. They provide strength and support

C. they manufactured food

D. They produce flowers

8. An organ of the excretory system that eliminates wastes that are no longer needed by the body and functions in the reabsorption of water and nutrients.

A. Heart
B. Kidney
C.Lungs
D. Stomach

9.Which of the following parts allow different activities of the cell to happen?

A. cytoplasm
B. lysosome
C. vacuole
D. vesicle

10. A relationship where one species benefits while the other is harmed is called___

A. Commensalism
B. mutualism
C. predation
D. symbiosis

11. If the chloroplasts of a plant cell are damaged, which will it be unable to do?

A. Protect the cell
B. make food for the cell
C. excrete waste materials.
D. give instruction for cell

12. A green pigment-containing organelle found only in plant cells.

A. Chloroplast
B. Golgi bodies
C. Mitochondrion
D. Nucleus

13. The powerhouse of cell

A. Chloroplast
B. Golgi bodies
C. Mitochondrion
D. Nucleus

14. It controls all the activities of the other parts that occur within the cell.

A. Chloroplast
B. Golgi bodies
C. Mitochondrion.
D. Nucleus

15. An organelle involved in the manufacturing of protein

A. Chloroplasts
B. Lysosomes
C. Ribosomes
D. Vacuoles

16. Which of the following is used in making cheese and yogurt?

A. Algae

B. bacteria

C. lichens

D. molds

17. Which of the following is an example of fungi?

A. Algae
B. bacteria
C. lichens
D. mushroom

18. Which microorganism is used in making bread?

A. Bacteria
B.lichens
C. mushroom
D. yeast

19. Why are bacteria and and fungi important in the environment?

A. They act as decomposers

B. They are sources of energy

C. they cause diseases to humans

D. They help beautify the surroundings

20. Which of the following is TRUE about fungi?

A. They can produce starch

C. They trap solar energy to produce sugar

B. They release oxygen to the air

D. They can cause decomposition of living things​