Nematodes Flashcards

0
Q

Are Nematodes protostome or deuterostome?

A

Protostome

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1
Q

What super-phylum do Nematodes belong to?

A

Ecdyozoa

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2
Q

What kind of coelom do Nematodes have?

A

Pseudocoelom

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3
Q

What kind of muscles do Nematodes have?

A

Longitudinal muscles

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4
Q

What is eutely?

A

A fixed number of cells. No new cells are added, instead existing cells grow larger.

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5
Q

What kind of gut do Nematodes have?

A

Complete gut

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6
Q

What is the evolutionary chain leading to Nematodes?

A

Multicellularity, tissue level organization, bilateral symmetry, coelom, cephalization, protostome development, molting (ecdysis)

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7
Q

What is significant about the nematode genome?

A

The nematode genome is fully sequenced and all nerve connections are mapped. Significant for genetics and DNA research.

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8
Q

Life mode(s)?

A

Parasitic, symbiotic and free-living

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9
Q

What layer is outside the epidermis?

A

Cuticle that molts

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10
Q

If there is no coelom, how does the body support it’s shape?

A

High pressure body cavity pseodocoelom filled with fluid.

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11
Q

What kind of movement do Nematodes display?

A

Whip-like based on longitudinal muscles.

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12
Q

3 factors in nematode locomotion

A
  • rigid cuticle with multiple layers of collagen fibre with different orientations
  • high pressure pseodocoelom
  • longitudinal muscles
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13
Q

How do Nematodes reproduce?

A
Asexual parthenogenesis (unfertilized eggs)
And sexual dioecious
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14
Q

How do Nematodes develope?

A

No firm larval stage

Cells increase in size with each molt, no cell number increase

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15
Q

Are Nematode parasites multi-host or single-host?

A

Both