Biologie Vegetale Flashcards

1
Q

Quand les premiers metazoaires?

A

+- 1 Ga (devaient etre mous -> no fossile)

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2
Q

Que libere une plante sous stress hydrique

A

Acide absecique

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3
Q

Pourquoi l’eau est importante pour la photosynthese?

A

Controle du stress hydrique -> fermeture des stomates -> trop de CO2 -> no photo

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4
Q

Qu’est que les defences morpho-anatomiques constitutive?

A

Deformation naturel pour retarder ou empecher les herbivores de saisir le vegetal grrt

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5
Q

Quel est une particularité de l’acacia?

A

A developpée des defences morpho-anatomique -> des piques epines

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6
Q

Pourquoi dans les environnement hostiles les plantes developpent t elles des defenses?

A

Puisque toute perte de matière peut leur etre fatal tlmt c’est la galère

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7
Q

Combien de % correspond a l’eau transipiré des plantes ?

A

90 %

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8
Q

formule du potentiel hydrique ?

A

SPGM -> ys(pot osmotique)+yp(pot pression)+ ym(matriciel) +yg(gravité)

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9
Q

Comment s’appelle les mousses ?

A

Bryophyte

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10
Q

Nom des fougeres ?

A

Filicophyte

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11
Q

Algues brune/rouges/vertes?

A

Phaecophycée/Rhodobiontes/Clhorophycée

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