Ch. 1: Sponges, Cnidarians, and Worms Flashcards
All animals have 3 characteristics in common. What are they?
Eukaryotes
Multicellular
Heterotrophs
What is a eukaryote?
Eukaryotes have a nucleus in their cells.
What is multicellular?
Multicellular have many cells.
What is a heterotroph?
Heterotrophs cannot make their own food; they must eat.
List the 4th major functions of animals.
Obtain food and oxygen
Move
Maintain stable internal conditions/homeostasis
Reproduce
What are the 3 characteristics biologists use to classify animals?
Body structure
Early development
DNA
An animals with a backbone is called a ______.
Vertebrate
An animals without a backbone is called an _________.
Invertebrate
An animal with ____ symmetry has many lines of symmetry that all go through a central point and divide the animal into mirror images.
Radial
What are 2 examples of animals with radial symmetry?
Sea star
Sea anemone
True or False. An animal with radial symmetry has a head and tail end.
False
True or False. Animals with radial symmetry all live in water.
True
An animal with _____ symmetry has one line of symmetry which divides its body into mirror images.
Bilateral
What are animals with bilateral symmetry?
Frog
Ant
True or False. An animal with this type of symmetry has a head and a tail end.
True
If a line of symmetry cannot be drawn through an animal’s body, it is said to have _______.
No symmetry
____ are the only animals with no symmetry.
Sponges
The phylum name of sponges is ______.
Porifera
Sponges use their _____ to support their bodies and protect themselves.
Spikes
Sponges are called ______ because they filter food out of the water using their ____ cells.
Filter-feeders
Collar
Sponges can reproduce asexually by _____ and sexually by producing _______.
Budding
Eggs and sperm
Cnidarians have 2 different body plans. What are they?
The polyp is vase-shaped, is attached to an underwater surface, and has its mouth and tentacles on the top.
The medusa is bowl-shaped, is free-swimming, and has its tentacles and mouth on the bottom.
What is a polyp? What is an example of one?
The polyp is vase-shaped, is attached to an underwater surface, and has its mouth and tentacles on the top.
An example of a cnidarian with this shape is sea anemone.
What is the medusa?
The medusa is bowl-shaped, is free-swimming, and has its tentacles and mouth on the bottom.
An example of a cnidarian with this shape is jellyfish.
