Unique Traits

Question 1

Phylum: Porifera

Answer 1

• made up of an aggregation of cells

- lacks tissues and organs

Question 2

Phylum: Cnidaria
Phylum: ctenophora

Answer 2

• contains tissues

- lacks organs

Question 3

Cnidaria unique traits

Answer 3

• 2 body forms
• stinging cells (cnidocytes)
• diploblastic

Question 4

Phylum: annelida

Answer 4

• round

- segmented

Question 5

Phylum: mollusca

Answer 5

• mantle
• shell-secreted by mantle
• muscular foot

Question 6

Phylum: nematoda

Answer 6

• round

- non segmented

Question 7

Phylum: Arthropoda

Answer 7

• jointed appendages
• exoskeleton (not the same as a shell)
• molt-shed outer skin to grow
• tagmata-specialized body regions

Question 8

Phylum: Arthropoda
Class: insecta
Traits unique to insects, difference between other Arthropods

Answer 8

• 3 tagmata: head, thorax, abdomen
• wings
• metamorphosis
• 1 pair of antennae
• 3 pairs of walking legs

Question 9

Phylum: echinodermata

Answer 9

• spiny, hard skin
• tube feet
• water vascular system

Question 10

Phylum: Chordata

Answer 10

• notochord becomes backbone in vertebrates
• pharyngeal Gill slits
• dorsal hollow nerve chord (becomes spinal cord in vertebrates)
• post anal tail