Chapter 1 Review: Introduction to Animals
cnidarians
What organisms have stinging cells?
nematoda
What phylum do roundworms belong to?
spongin
What sharp structures do the body of most sponges contain?
omnivore
What type of animal eats both plants and animals?
tapeworm
What type of flatworm lacks a digestive tract?
bilateral symmetry
What type of symmetry do all flatworms have?
bilateral symmetry
What type of symmetry has body parts arranged the same way on both sides of the body?
asymmetrical
What type of symmetry has no particular shape?
radial symmetry
What type of symmetry is arranged around a center like spokes on a wheel?
tapeworm
What uses hooks and suckers to attach itself to the intestines of the host?
medusa
What was the first form of cnidarian?
filter feeder (a sponge)
What organism obtains food by filtering it from the water?
tentacles
What are armlike structures that surround the mouth of a cnidarian?
1. Animals are made of many cells that carry out different functions. 2. Animals are eukaryotic and have a nucleus with membrane bound organelles 3. Animals depend on other living things for food. 4. Animals digest their food. 5. Most animals move from place to place. 6. Animals are capable of reproduction. All animals can reproduce sexually, and some can reproduce asexually.
What are the six characteristics of animals?
radial, bilateral, and asymmetrical
What are the three types of symmetry?
polyp and medusa
What are the two types of body forms of cnidarians?
roundworms
What causes heartworm disease in dogs?
collar cells
What cells are located on the inside of the sponge and help water movement through the entire organism?
medusa; jellies
What cnidarian body form is bell-shaped and free swimming? What is an example of this body form?
polyp; anemone, coral
What cnidarian body form is shaped like a vase and is usually sessile? What is an example of this body form?
sessile
What describes an organism that remains attached to one place during its lifetime?
cilia
What do sponge larvae have that allow them to swim in the water?
adaptation
What is a structure, process, or behavior that helps an animal survive in its environment?
carnivore
What is an animal that eats only other animals?
herbivore
What is an animal that eats only plants or plant parts?
vertebrate
What is an animal with a backbone?
invertebrate
What is an animal without a backbone?
hermaphrodite
What is an organism that produces both eggs and sperm in the same body?
a tube within a tube
What is the body form of roundworms?
usually asymmetrical; sometimes radial
What is the body shape of a sponge?
nematoda
What is the largest phylum of worms?
anus
What is the opening of the digestive tract where wastes leave?
regeneration
What is the type of asexual reproduction that replaces body parts?
radial symmetry
What kind of symmetry do all cnidarians have?
planarian
Why type of flatworm is free-living?
