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6th Grade Science 2023-2024 > Ch. 1: Sponges, Cnidarians, and Worms > Flashcards

Ch. 1: Sponges, Cnidarians, and Worms Flashcards

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Biology 101 flashcards
1
Q

All animals have 3 characteristics in common. What are they?

A

Eukaryotes
Multicellular
Heterotrophs

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2
Q

What is a eukaryote?

A

Eukaryotes have a nucleus in their cells.

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3
Q

What is multicellular?

A

Multicellular have many cells.

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4
Q

What is a heterotroph?

A

Heterotrophs cannot make their own food; they must eat.

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5
Q

List the 4th major functions of animals.

A

Obtain food and oxygen
Move
Maintain stable internal conditions/homeostasis
Reproduce

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6
Q

What are the 3 characteristics biologists use to classify animals?

A

Body structure
Early development
DNA

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7
Q

An animals with a backbone is called a ______.

A

Vertebrate

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8
Q

An animals without a backbone is called an _________.

A

Invertebrate

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9
Q

An animal with ____ symmetry has many lines of symmetry that all go through a central point and divide the animal into mirror images.

A

Radial

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10
Q

What are 2 examples of animals with radial symmetry?

A

Sea star
Sea anemone

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11
Q

True or False. An animal with radial symmetry has a head and tail end.

A

False

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12
Q

True or False. Animals with radial symmetry all live in water.

A

True

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13
Q

An animal with _____ symmetry has one line of symmetry which divides its body into mirror images.

A

Bilateral

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14
Q

What are animals with bilateral symmetry?

A

Frog
Ant

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15
Q

True or False. An animal with this type of symmetry has a head and a tail end.

A

True

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16
Q

If a line of symmetry cannot be drawn through an animal’s body, it is said to have _______.

A

No symmetry

17
Q

____ are the only animals with no symmetry.

A

Sponges

18
Q

The phylum name of sponges is ______.

A

Porifera

19
Q

Sponges use their _____ to support their bodies and protect themselves.

A

Spikes

20
Q

Sponges are called ______ because they filter food out of the water using their ____ cells.

A

Filter-feeders
Collar

21
Q

Sponges can reproduce asexually by _____ and sexually by producing _______.

A

Budding
Eggs and sperm

22
Q

Cnidarians have 2 different body plans. What are they?

A

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.

23
Q

What is a polyp? What is an example of one?

A

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.

24
Q

What is the medusa?

A

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.

25
Q

What are a cnidarian’s stinging cells used for?

A

Capture prey and defend itself

26
Q

A _____ is made up of the skeletons of both living and dead coral cnidarians.

A

Coral reef

27
Q

List the 3 types of worms and give an example of each.

A

Platyhelminthes (flat) - tapeworm
Nematoda (round) - ascarid
Annelida (segmented) - earthworm

28
Q

What are the 6 characteristics of worms?

A

Long, narrow bodies without legs
Invertebrates
Bilateral symmetry
Tissues, organs, and body systems
Simplest organisms with a brain
Reproduce sexually and asexually

29
Q

A flatworm has a digestive system with ___ opening. This is known as a ____ digestive system.

A

1
2-way

30
Q

Both roundworms and segmented worms have a ___ digestive system which is like a tube that has ___ openings - one at both ends. Food enters through the ___ and wastes exit through the ___.

A

1-way
2
Mouth
Anus

31
Q

A segmented worm has a ____ circulatory system with blood that moves through blood vessels.

A

Closed

32
Q

Earthworms help the soil by digging tunnels and make it fertile with their ____.

A

Tunnel
Wastes

6th Grade Science 2023-2024 (1 decks)

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