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Bio Kb > Animal Kingdom > Flashcards

Animal Kingdom Flashcards

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Biology 101 flashcards
1
Q

Organ system

A

Different groups of animals exhibit various patterns of complexities in organ systems.

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2
Q

Example of incomplete digestive system

A

Platyhelminthes

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3
Q

Asymmetrical animals

A

No general body plan
Or
Axis of symmetry that divides the body into mirror images halves

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4
Q

Radially symmetrical animals

A

Body parts are organised around the central axis

Body can be divided into 2 identical halves along radial plane

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5
Q

Bilateral symmetrical animals

A

Can be divided into identical right and left halves in only 1 plane

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6
Q

Example of triploblastic animals

A

From platyhelminthes to chordates

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7
Q

Germ layers are also called

A

Embryonic tissue layers

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8
Q

Who lackes tissue layers

A

Sponges

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9
Q

Use of germ layers

A

Cells differentiate into further organs and organ systems

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10
Q

Example of diploblastic animals

A

Coelenterates

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11
Q

What is mesoglea

A

Undifferentiated layer between endoderm and ectoderm in diploblastic animals which is gelatinous in nature.

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12
Q

Largest kingdom

A

Animal kingdom

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13
Q

Most diverse kingdom

A

Animal Kingdom

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14
Q

Animal Kingdom is also called as

A

Metazoa

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15
Q

Porifera/sponges

A

Primitive multicellular organisms having cellular level of organisation

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16
Q

Symmetry of sponges

A

Asymmetrical or radially symmetrical

17
Q

2 layers of sponges

A

Outer pinacoderm n inner coanoderm

18
Q

In between pinacoderm and choanoderm we have

A

Mesenchyme or mesoglea

19
Q

Mesenchyme

A

Gelatinous non cellular with wandering amoebocytes

20
Q

Pinacoderm encloses

A

Cavity called spongocoel

21
Q

Spongocoel opens to the exterior by

A

Osculum

22
Q

What are spicules

A

Internal needle like structures on skeleton of porifera

23
Q

Spicules are in the form of

A

Spongin fibres

24
Q

Sponges have

A

Water system or canal system

25
Q

Ostia

A

Minute pores on body wall of sponges

26
Q

Asexual reproduction in sponges

A

Invovles formation of external or internal buds called gemmules.

27
Q

Examples of porifera

A

Spongilla - freshwater sponge

Euspongia - bath sponge

Bio Kb (4 decks)

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