14. Which of the following DOES NOT show any relationship between the plants and animals?

A. Plants manufacture food that animals eat.

B. Some animals did not eat the leaves and fruits of plants.

C. Plants provide food for the animals while animal waste serves as fertilizers for the plants.

D. Plants provide animals with oxygen and the animals provide the plants with carbon dioxide.

15. Why do farmers remove weeds from their farmland?

A. Weeds do not give harm to plants.

B. Weeds supply the plants with the needed minerals.

C. Weeds develop a mutual relationship with the plants.

D. Weeds compete with the plants for the needed nutrients.

16. Mosquitoes are harmful. They are carriers of diseases such as malaria and dengue H-fever. They like to stay in

dark places. Why do we need to keep our surroundings clean?

A. To have a healthy living.

B. To get rid of disease-causing parasites.

C. To get rid of a parasitic organism like mosquitoes.

D. All of the above

17. How does a mother hen keep her chicks when a crow is flying around them?

A. Mother hen drives away the crow.

B. Mother hen fly high and fight the crow.

C. Mother hen carries her chicks to a safe place.

D. Mother hen covers its wings to hide her chicks until the crow is fly away.

18. What will happen if there are no more bees and butterflies?

A. There are more plants to grow

B. There were fewer plants to grow.

C. There were more fruits to harvest.

D. There were many flowers to bloom.

19. In a tropical rain forest, plants differ in height and live close to one another. Why such an arrangement like this is

important?

A. for the increase of production

B. for lessening of competition

C. for effective utilization of resources

D. for creating an unfavorable environment

20. Which of the following correctly describes competition?

A. One species kills the other for food.

B. Two species benefit from each other.

C. Two or more species consume limited resources.

D. One species benefited while the other is not harmed.​