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Life Science Chap 15

Life Science for Christian Schools Chapter 15 Invertebrates

QuestionAnswer
About how many animals species are there? Over one million live on the earth
Why is a bee called an invertebrate? It has the absence of a backbone
Besides bone, list three things of which an animal's skeleton could be composed. Limestone, glass, protein and even water
What is an invertebrate? An invertebrate is an animal without a backbone
To what characteristic does the name of the phylum that includes sponge refer? Characteristic of having pores
If adult sponges are permanently attached to solid objects, how can they colonize other areas? embryonic sponges can swim about briefly
What do sponges eat? Microscopic food particles that they filter from the water.
All sponges belong to what phylum Phylum Porifera
Hydra, coral, Portuguese-man 0f -war, jellyfish belong to what phylum? Phylum Cnidaria
Planarian, tapeworm, fluke belong to what phylum Phylum Platyhelminthes
Ascaris (Common roundworm), hookworm, Filarial worm belong to what phylum Phylum Nematoda
Earthworm, leech belong to what phylum Phylum Annelida
What is the supporting material in a jellyfish's skeleton? A jellylike mass that fills the space between two tissue layers.
Where do jellyfish digest there prey? In their gastorovascular cavities.
The soft body of a coral is called a ________? Polyp
What type of symmetry does a planarian have? bilateral symmetry
How many longitudinal nerves does a planarian have? two
Where is the mouth of a planarian? On its underside near the middle of its body
Where do adult Ascaris normally live? in the intestines of various animals
Are roundworms animal parasites only? Explain. No. Explain: the Vinegar eel (kind of roundworm) contributes to the taste of cider and other roundworms cause serious plant diseases.
Name three annelids besides earthworms. Leeches, tubeworms, scale worms, clam worms and lugworms
Mechanical digestion occurs in the earthworm's _________? Gizzard
How does an earthworm breathe? It exchanges oxygen and carbon dioxide through its moist skin
What does the word invertebrate literally mean? Prefix in means not or without
What is the key characteristic of sponges? they have pores
Of what two materials may a sponge skeleton be composed? Spongin and spicules
Why do hard corals live in relatively shallow depths? Most have algae living inside their tissue and they need light
Name the structure that jellyfish use for stinging? Nematocysts
What type of symmetry do Cnidarians have? Radial symmetry
What is the name given to the simple brain of an invertebrate such as a planarian? Ganglion
How does a planarian get rid of its waste products? Nondigestible material is pushed out of the intestine through the mouth
What material or substance provides support for an animal that has a hydrostatic skeleton? water
Name three roundworms. hookworms, pinworms and trichina worms
When an earth worm moves, what structures allow it to hold on to the soil? Bristles
What do you call the nondigested soil and food that an earthworm gives off as waste? Castings
 

 



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