What is the difference between vertebrates and invertebrates?
Vertebrates: have skeletons that include backbones inside the body.
Invertebrates: are animals that lack backbones.
100
What are spicules?
Spicules are hard, spikelike structures that form a framework of support. Some spicules are composed of calcium carbonate, the material that makes up the shells of snails and clams.
100
What is a Medusa?
Medusa is one of the two body forms of Cnidarians. It is shaped like an umbrellla or bell and is designed for swimming. In a medusa the mouth is pointed down and is surrounded by hanging tentacles.
100
What is a Nematoda?
It is the phylum that roundworms belong too.
200
What is Bilateral Symmetry?
Animals with bilateral symmetry can be divided into two matching sides, a right and left side.
200
What is Spongin?
Spongin is a flexible substance that forms a network between the cells and provides support for the bodies of some sponges.
200
What is a Polyp?
A polyp is one of the two body forms of Cnidarians. The body is shaped like a vase and is designed to be attached to something. In polyps the mouth is pointed up and is surrounded by tentacles that full food into the upward-pointing mouth.
200
How do the three phyla of worms differ?
Flatworms have a flattened body, distinct head and tail.
Round worms have a cylindrical body without segments.
Segmented worms have a cylindrical body divided into segments.
300
What is Radial Symmetry?
Animals with radial symmetry have their body parts arranged around a central axis, much like the spokes on a wheel.
300
How do sponges get their food?
Water and materials move into the body through numerous openings called pores.
300
How do Cnidarians get there food?
Most cnidarians capture their prey by using the stinging cells on their tentacles.
300
What are some characteristics of Flatworms?
Belong to the phylum Platyhelminthes.
Flattened body, distinct head and tail.
May be free living or live as internal parasites.
Free living: Planaria. Light sensitive eyespots. Tubelike mouth.
Internal parasites: Tapeworm. Head with sucking mouthparts surrounded by many hooks. Parasites in many animals, including humans.
400
What are some common invertebrate phylum?
The common invertebrate phyla include: Sponges, Cnidarians, Roundworms, Flatworms, Segmented worms, Echinoderms, Mollusks, Arthropods.
400
What is the structure of sponges like?
Sponges have a hollow body
400
How is coral different from other cnidarians?
Unlike other cnidarians, most corals live in colonies and form reefs by cementing their calcium skeletons to skeletons of adjacent polyps.
400
What are some characteristics of Roundworms?
Belong to the phylum Nematoda.
Cylindrical body without segments.
May be free living or live as parasites.
Can cause disease in humans. Hookworm. Trichina worm
500
What are some characteristics of animals?
Characteristics of animals include:
Eukaryotic cells
Multicellular
Lack chlorophyll, unable to produce their own food, and must rely on eating other organims
500
What are some characteristics of sponges?
Some characteristics of sponges include:
A hollow body
Cells are not specialized into tissues
Water and materials move into the body through numerous openings called pores
Waste moves out of the body through a large opening at the top of the sponge
500
What are some characteristics of Cnidarians?
The characteristics of Cnidaria include:
Hollow sac-like body that occurs in two forms. A vase shaped body called a polyp or a bell shaped body called a medusa. Cells are specialized into tissues.
Only one opening into the body.
Tentacles with stinging cells.
500
What are some characteristics of Segmented worms?
Belong to the phylum Annelida.
Cylindrical body divided into segments.
Well developed organ systems.
May be free living or live as parasites.
Free living: Earth worm. Live in soil
Parasitc: leeches. Live in water and attach to fish and other animals and such blood from veins in the skin.