Assessment No. 6 - Science 6

What is the main characteristic of sponges during their adult lives?

• a. Active hunting

• b. Sessile behavior

• c. Swimming ability

• d. Colony formation

How do sponges obtain food?

• a. Through nematocysts

• b. By hunting actively

• c. Filter feeding

• d. Photosynthesis

What is the large opening through which water leaves the sponge called?

• a. Osculum

• b. Pores

• c. Nematocysts

• d. Spicules

What do corals secrete to form structures called coral reefs?

• a. Hard minerals

• b. Tough fibers

• c. Nematocysts

• d. Limestone

What is the name of the stinging cells found in cnidarians?

• a. Collar cells

• b. Osculum cells

• c. Nematocysts

• d. Spicules

Which is NOT a characteristic of cnidarians?

• a. No internal organs

• b. Have stinging tentacles

• c. Have many pores in their body

• d. Have only one opening for food and waste

Which phylum includes flatworms?

• a. Platyhelminthes

• b. Nematoda

• c. Annelida

• d. Mollusca

Which of the following exhibits complete digestive tracts with separate mouths and anuses?

• a. Flatworms

• b. Roundworms

• c. Segmented worms

• d. Both b and c

What structure do mollusks use for feeding and locomotion?

• a. Tentacles

• b. Mantle

• c. Radula

• d. Siphon

What is the outer protective covering of many mollusks called?

• a. Exoskeleton

• b. Endoskeleton

• c. Shell

• d. Carapace