Read carefully and understand each statement them choose the petter of the correct answer.

1.which of the following invertebrates does not belong to the group?
A. Jellyfish
B. Corals
C. Sea anemones
D. Tapeworm
2. Which group of invertebrates is softbodied and has shell inside or outside their bodies called skeleton?
A. Snails, squids, clams, octopus
B. Clams, jellyfish, sea anemone, octopus
C. Spiders, butterflies, insects, octopus
D. Flatworms, tapeworms, flukes, octopus
3. Starfish and sea urchins are animals with spiny endoskeleton in which group of invertebrates do they belong?
A. Echinodorms
B. Crustaceans
C. Arthropods
D. Mollusks
4. Which of the following describes arthropods like insects and spiders?
A. They have segmented bodies and jointed appendages that help them move
B. They are softbodied animals
C. They have endoskeleton
D. They crawl
5. Why are plants important to ecosystem?
A. Plants are the major sources of food of other living organisms in the ecosystem
B. Plants absorb carbon dioxide and oxygen in the atmosphere
C. Plants beautify surroundings
D. Plants gives us fresh air
6. Earthworms and leeches are examples of annelids. Which of the following are the characteristics of annelids?
A. They have segmented bodies that allow for specialization of tissues and for efficient movement
B. They have shells outside their body called endoskeleton
C. They do not have digestive system
D. They have one body opening
7. What feeding relationship exist in the coral reefs when a shark eats dolphin?
A. Mutualism
B. Predation
C. Competition
D. Commensalism
8. Why do we need to protect are mangrove ecosystem?
A. It is source of livelihood of people living in the coastal area
B. It acts as natural barrier and flood defense
C. It provides shelter to other animals
D. All of the above
9. What will happen if people cut down trees in the tropical ecosystem?
A. Food supply will become abundant
B. Climate will become cooler
C. Animals will not become endangered and extinct
D. Competition for food among organisms in the ecosystem will not exist
10. Which of the following shows interaction among living and non-living things in a tropical rainforest ecosystem?
A. Plants provide oxygen to man and animals, in return man and animals release carbon dioxide needed by plants for food making
B. Decayed matter fertilizes the soil needed by plants to grow healthy
C. Sun provides energy to soils
D. Both A and B
Please answer po para po sa kapatid ko yan, busy din po kasi ako sa works ko sa school di ko po siya matulungan