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BIODIVERSITÉ 1 > Rhizaria > Flashcards

Rhizaria Flashcards

1
Q

Caractéristiques Rhizaria

A

Unicellulaires
Amiboïdes ou flagellés
Certains ont une coquille dures
Mitochondries à crête tubulaire

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2
Q

Embranchements de Rhizaria

A

Cercozoa
Foraminifera
Radiolaria

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3
Q

Caractéristiques Test de Foraminifera

A

CaCO3 (pas acide)
Muni de un ou plusieurs orifices ou foramens qui produit des filipodes pour la disgestion (hétérotrophe)
Un ou plusieurs loculus (loge) selon l’espèce

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4
Q

Cycle de vie Foraminifera

A

Haplo-diplophasique complexe

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5
Q

Modes de vie Foraminifera

A

Marin
Benthique (sur et dans le sédiment marin)
Planctonique (parfois)

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6
Q

Taille Foraminifera

A

0,035 à 1 mm

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7
Q

Mode de vie Radiolaires

A

Zooplancton
Fonds marins
Parfois avec algue symbiotique
Isolés ou coloniaux

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8
Q

Apparence Radiolaires

A

Symétrie radicale

Ressemble aux foraminifères

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9
Q

Caractéristiques Test Radiolaires

A

SiO2
Parfois sulfate de strontium
Rayons de pseudopodes aciculaires (axopodes)

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10
Q

Taille Radiolaire

A

0,1 à 1 cm

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BIODIVERSITÉ 1 (9 decks)

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