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Biology > Invertebrates > Flashcards

Invertebrates Flashcards

1
Q

Organism classified as a Heterotroph

A

Animals

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2
Q

Animal characteristics

A 
Heterotrophs 
Multicellular 
No cell wall 
Cells organized into tissues 
Able to move 
Diverse 
Reproduce sexually 
Pattern on embryonic development
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3
Q

Only animal not organized into tissues

A

Sponges

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4
Q

System that only has vessels

A

Closed circulatory system

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5
Q

System that has combination of blood vessels and large thin walled sinuses

A

Open circulatory

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6
Q

Individual that can produce both sperm and eggs

A

Hermaphrodite

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7
Q

Suggested ancestor of bilateral invertebrates

A

choanoflagellates

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8
Q

Animal embryonic development

A

Zygote
Morula
Blastula
Gastrula

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9
Q

What forms the gut

A

Endoderm

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10
Q

Forms part of nervous system and epidermis

A

Ectoderm

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11
Q

Forms muscles and most internal organs

A

Mesoderm

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12
Q

What are the two diploblastic germlayers?

A

Endoderm

Ectoderm

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13
Q

What are the 3 triploblastic germ layers

A

Endoderm
Mesoderm
Ectoderm

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14
Q

Characterized by plane of symmetry that forms mirror images around vertical plane in midline

A

Bilateria

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15
Q

What are the advantages of bilateria

A

Greater efficiency in movement for seeking food and mates

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16
Q

What phylum did symmetrical body plans first evolve?

A

Cnidaria

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17
Q

Lack symmetry

Have no tissue or organs

A

Parazoa

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18
Q

Have tissue and more that one type of true tissues and organs

A

Eumetazoa

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19
Q

What is the difference between parazoa and eumetazoa

A

Parazoa don’t have symmetry and true tissues or organs. Eumetazoa do

20
Q

Animal with notochord

A

Chordata

21
Q

3 body plans for bilateral symmetrical animals

A

Acoelomates
Coelomates
Pseudocoelomate

22
Q

Have no body cavity

A

Acoelomates

23
Q

Have fluid filled body cavity lined with mesodermal cells and devolops within mesoderm

A

Coelomates

24
Q

Has body cavity located between endoderm and mesoderm

A

Pseudocoelomate

25
Q

Pseudocoelomate animal body cavity

A

Pseudocoelom

26
Q

What layer is endoderm located on

A

Inner layer

27
Q

Where is the mesoderm located

A

Outer layer

28
Q

3 Dominant animal phyla on land

A

Mollosca
Anthropods
Chordata

29
Q

Phyla with greatest number of species

A

Anthropoda

30
Q

What was the animal evolutions transitions for symmetry

A

Radial to bilateral

31
Q

What was animal evolution in regard to body cavity

A

No body cavity to body cavity

32
Q

What was animal evolution in regard to segmented bodies

A

Unsegemented to segemented bodies

33
Q

Animal development in regard to stome development

A

Prostome to deuterstome

34
Q

Prostome characteristics

A

Spiral cleavage

Mouth develops from blastospore anus develops from second opening

35
Q

What blastic are deuterostomes?

A

Triploblastic

36
Q

What are deuterostomes evolved from

A

Prostomes

37
Q

What symmetry are deuterostomes

A

Bilateral

38
Q

Intdeterninate development means

A

Any cell from embryo (up to 8) can develop into complete organisms

39
Q

Coelom evolution led to what skeleton development?

A

Hydrostatic skeleton development

40
Q

Hydrostatic skeleton development led to what system

A

Circulatory system

41
Q

Circulatory system solved the problem of

A

Barrier to diffusion created by gut surrounded by tissue

42
Q

Animals with true coelom

A

Coelomates

43
Q

True coelom is

A

Completely closed by mesoderm

44
Q

Psuedocoelom has what layers?

A

Outer layer of mesoderm

Inner layer of endoderm

45
Q

Animal with neither a coelom or a pseudocoelom therefore lacking a body cavity

A

Coelom evolution

Biology (5 decks)

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