Invertebrate Diversity

Question 1

How many layer do diploblastic tissues have and what are they?

Answer 1

2, endoderm and ectoderm

Question 2

How many layer do triploblastic tissues have and what are they?

Answer 2

3, endoderm, mesoderm, ectoderm

Question 3

What phylum are sponges in?

Answer 3

porifera

Question 4

Porifera

Answer 4

-simple animals
-lack true tissues
-lack body symmetry
-usually marine
-amoebocytes
-hermaphrodites

Question 5

How do animals in the porifera phylum get food?

Answer 5

by their flagellated choanocytes (filter food by passing water through pores in the body)

Question 6

what are the pores that water is drawn through in the phylum porifera?

Answer 6

spongocoel and osculum

Question 7

what does hermaphrodite mean?

Answer 7

the animal has both sex organs like porifera

Question 8

What type of symmetry does the phylum cnidaria have?

Answer 8

radial

Question 9

How many tissues layers does the phylum cnidaria have?

Answer 9

2, diploblastic

Question 10

What are the “stinging cells” that cnidaria have called?

Answer 10

cnidocytes

Question 11

What are the two body forms of cnidaria?

Answer 11

1. polyp
2. medusa

Question 12

What is the common name for the phylum Platyhelminthes?

Answer 12

flatworms

Question 13

Flatworms (Platyhelminthes)

Answer 13

-simplest bilateral animals
-no body cavity (acoelomates)
-marine, freshwater, damp habitats
-hermaphrodites
-gastrovascular cavity

Question 14

How are tapeworms classified?

Answer 14

as parasitic flatworms

Question 15

Nematoda

Answer 15

-have body cavity
-bilateral symmetry
-triploblastic
-free living and parastic
ex: roundworms

Question 16

What type of digestive system do the phylum Nematoda have?

Answer 16

complete digestive tract

Question 17

Mollusca

Answer 17

-muscular food
-most have shells
-circulatory system

Question 18

What are the 3 body parts of a mollusca?

Answer 18

1. muscular foot
2. visceral mass
3. mantle

Question 19

what are annelids?

Answer 19

segmented worms

Question 20

Annelida

Answer 20

-nervous system
-closed circulatory system
-coelomates (have a true body cavity)

Question 21

What are the 2 major clades of annelids?

Answer 21

1. errantians: mobile most marine
2. sedentarians: less mobile includes earthworms and leeches

Question 22

What is the most diverse animal phyla?

Answer 22

arthropoda

Question 23

Arthropoda

Answer 23

-hard exoskeleton made of chitin
-open circulatory system
-jointed appendages

Question 24

What are the 3 sections of the body in arthropods?

Answer 24

1. head
2. thorax
3. abdomen

Question 25

How many legs per segment do milipeds have?

Answer 25

2 legs per segment

Question 26

How many legs per segment do centipedes have?

Answer 26

1 leg per segment

Question 27

What is the most successful group of animals?

Answer 27

incets

Question 28

What happens in incomplete metamorphosis?

Answer 28

the insect molts

Question 29

What is a deuterostome?

Answer 29

anus forms before mouth

Question 30

What is a protostome?

Answer 30

meaning first mouth, the mouth forms before the anus

Question 31

Echinodermata

Answer 31

-slow moving or sessile
-all marine
-spiny skin
-radial symmetry as adults
-deuterostomes

Question 32

What 4 things must an animal have to be considered in the phylum chordata?

Answer 32

1. hollow nerve cord
2. notochord
3. pharyngeal slits
4. post anal tail

Question 33

What 2 phyla are duterostomes?

Answer 33

1. Echinodermata
2. Chordata