1. Which of the following best describes the relationship of durian and

lanzones trees competing for space and sunlight?

A. The durian tree is harmed while the lanzones tree is benefited.

B. The durian tree is benefited while the lanzones tree is harmed.

C. The durian tree and lanzones tree are both harmed from the

relationship.

D. The durian tree and lanzones tree are both benefited from the

relationship.



2. The acacia tree provides the ants food and shelter. The ants, on the other

hand, protects the acacia tree from plant-eating insects. This relationship

is the same as that of_____.

A. a mosquito and man C. the grasses in the garden

B. a frog and a cricket D. a bee and a flowering plant



3. Which of the following examples describes commensalism?

A. Tick on the skin of a dog

B. Lions hunting and killing a buffalo

C. An orchid living on a trunk of a mahogany tree

D. An insect larva staying on the leaves of a tomato plant



4. Which of the following examples is competition?

A. Butterfly feeding on nectar of a flower

B. Fishes in the coral reefs looking for food

C. Orchids attach itself on the trunk of a tree



5. Which of the following describes mutualism?

A. Giraffe eating leaves of trees

B. Barnacle sticking on the shell of an oyster

C. An orchid living on a trunk of a mahogany tree

D. Rhizobium bacteria living in the roots of nodules of peanuts



6. Orchid and tree, remora and shark, heron and carabao, frog and plant.

Which of the following groups of organisms are commensals?

A. Orchid, shark, heron, frog C. Tree, shark carabao, plant

B. Orchid, remora, heron, frog D. Tree, remora, carabao, plant



7. Which of the following statements is NOT CORRECT?

A. In mutualism both organisms are benefited.

B. In parasitism, the parasite gets nutrients from its host.

C. In competition, the organisms are both harmed in the relationship.

D. In commensalism, the organisms compete for food, shelter



8. In parasitism, the parasites live inside or outside the body of the host in

order to survive. Which of the following organisms is not a parasite?

A. Ant B. Bacteria C. Mosquito D. Tick



9. The ecological relationship of plants in the terrarium is the same kind of

relationship as that of ______.

A. cow and flea C. pigs in the pigpen

B. snake and frog D. crocodile and fish















10.Which of the following statement is TRUE in commensalism?

A. Both of the organisms are harmed.

B. Both of the organisms are benefited.

C. One organism is benefitted while the other is harmed.

D. One organism is benefited while the other is unaffected​