Pretest
Direction: Write the letter of the correct answer on the answer steeds provided on pages
9-10
1. What do you call the interaction between living things (bioto) and non-living things
(abiotic)?
biomes b. ecosystem c. relationship d. creation
2. Which food chain occurs in the forest ecosystern?
grass-caterpillar-birds
c, grass wild bees lion
b.
grass-mouse-snake
d. grass-rabbit-ow
3. Which organisms show commensalism?
a. small fish and algae
b, orchid attached to a branch of a tree
b. eagle eating snake
d. a tick on animal's body
4. In a forest ecosystem, which organisms are directly affected if the population of plants
decreases?
a. carnivores b. decomposer c. herbivores d. predators
5. Which of the following destroys the marine ecosystem?
a. fishponds
c. dynamite fishing
b. reclamation
d. constructing man-made sanctuaries​