Invertebrate Diversity Flashcards

1
Q

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

A

2, endoderm and ectoderm

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2
Q

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

A

3, endoderm, mesoderm, ectoderm

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3
Q

What phylum are sponges in?

A

porifera

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4
Q

Porifera

A

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

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5
Q

How do animals in the porifera phylum get food?

A

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

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6
Q

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

A

spongocoel and osculum

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7
Q

what does hermaphrodite mean?

A

the animal has both sex organs like porifera

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8
Q

What type of symmetry does the phylum cnidaria have?

A

radial

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9
Q

How many tissues layers does the phylum cnidaria have?

A

2, diploblastic

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10
Q

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

A

cnidocytes

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11
Q

What are the two body forms of cnidaria?

A
  1. polyp
  2. medusa
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12
Q

What is the common name for the phylum Platyhelminthes?

A

flatworms

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13
Q

Flatworms (Platyhelminthes)

A

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

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14
Q

How are tapeworms classified?

A

as parasitic flatworms

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15
Q

Nematoda

A

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

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16
Q

What type of digestive system do the phylum Nematoda have?

A

complete digestive tract

17
Q

Mollusca

A

-muscular food
-most have shells
-circulatory system

18
Q

What are the 3 body parts of a mollusca?

A
  1. muscular foot
  2. visceral mass
  3. mantle
19
Q

what are annelids?

A

segmented worms

20
Q

Annelida

A

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

21
Q

What are the 2 major clades of annelids?

A
  1. errantians: mobile most marine
  2. sedentarians: less mobile includes earthworms and leeches
22
Q

What is the most diverse animal phyla?

A

arthropoda

23
Q

Arthropoda

A

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

24
Q

What are the 3 sections of the body in arthropods?

A
  1. head
  2. thorax
  3. abdomen
25
How many legs per segment do milipeds have?
2 legs per segment
26
How many legs per segment do centipedes have?
1 leg per segment
27
What is the most successful group of animals?
incets
28
What happens in incomplete metamorphosis?
the insect molts
29
What is a deuterostome?
anus forms before mouth
30
What is a protostome?
meaning first mouth, the mouth forms before the anus
31
Echinodermata
-slow moving or sessile -all marine -spiny skin -radial symmetry as adults -deuterostomes
32
What 4 things must an animal have to be considered in the phylum chordata?
1. hollow nerve cord 2. notochord 3. pharyngeal slits 4. post anal tail
33
What 2 phyla are duterostomes?
1. Echinodermata 2. Chordata