Complex Animals: Annelids and Arthropods

Earthworms and leeches are annelids.

• TRUE

• FALSE

Which percentage of all known animal species are arthropods?

• 60%

• 70%

• 80%

• 90%

One of the most important adaptations that contributes to animal complexity is...

• segmentation

• metamorphosis

• molting

• photosynthesis

When did the earliest ancestor of all segmented animals (including us) live?

• 10 thousand years ago

• 3 billon years ago

• 600 million years ago

• 100 years ago

How are earthworms useful to the environment and us?

• They fertilize soil.

• They allow water and air to enter soil.

• They decompose.

• They produce oxygen.

• They destroy harmful insects.

This animal is a parasite.

• TRUE

• FALSE

How is the middle segment of an insect called?

• head

• thorax

• abdomen

• appendage

How is hard outer coating of arthropods, made of chitin, called?

• exoskeleton

• endoskeleton

• cephalothorax

• plesiomorphy

What is the meaning behind the name of phylum Arthropoda?

• Jointed feet

• Many feet

• Thin feet

• Segmented feet

Arachnids have a cephalothorax, which means they have...

• combined head and thorax

• combined thorax and abdomen

• no wings attached to thorax

• abdomen before thorax

Tags

NGSS.MS-LS4-2