Sponges
What common name do we use for poriferans?
Sponges!
Name one animal that belongs to the cnidarians group.
Jellyfish / coral / sea anemone / hydra
What type of symmetry do worms have? Try to describe it!
Bilateral symmetry
Name the body part that helps land snails move around.
The foot!
What is an example of a crustacean?
Crabs/lobsters/shrimp
Where do poriferans live? Are they mobile or immobile?
Attached to the sea floor! They are immobile.
What type of symmetry do cnidarians have? Try to describe it!
Radial symmetry
Name one of the three main groups of worms.
Flatworms / nematodes / annelids
What are gills?
This breathing structure is used by most aquatic molluscs to obtain oxygen from water.
What type of outer covering protects the body of arthropods?
Exoskeleton.
What is the name of the hole where waste leaves the sponge?
What are the stinging cells in cnidarians called? What is one function of them?
Cnidocytes, cnidarians catch prey using these cells.
How do terrestrial worms usually breathe? Try to describe it!
Through their skin (cutaneous respiration)
Which group of molluscs has two shells (valves)?
Bivalves
Which group of arthropods includes spiders and scorpions?
Arachnids
Define budding.
Budding is an asexual reproduction method in which a new organism develops from a bud of an existing organism
What are the two body forms that cnidarians alternate between?
Polyp and medusa
How can worms reproduce both sexually and asexually?
Sexually through fertilization and asexually by fragmentation
What three main body parts do molluscs have?
The mantle, muscular foot, and visceral mass.
Define molting.
Molting is the process by which animals shed worn-out skin, or exoskeleton and replace them with new growth
Describe two characteristics that show poriferans are very simple animals.
They have no true tissues or organs and no nervous system or muscles.
Describe the alternation of generations in cnidarians.
Sexual reproduction produces a polyp from a zygote, and the polyp reproduces asexually to produce medusae.
Why are worms important for soil health?
They decompose organic matter, release nutrients, and provide oxygen to the soil.
What is the name of the tube that clams use to create a water current inside their shell?
What are the three main body parts of bees?
Head, thorax, and abdomen.