Ch 20 & 21 Flashcards Preview

Plant Biology > Ch 20 & 21 > Flashcards

Flashcards in Ch 20 & 21 Deck (10):
1

Sorus

in ferns, a cluster of sporangia on the underside of leaves

2

Bisexual gametophyte

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3

Fiddlehead

type of fern; developing unopened leaves; young edible and cooked as a vegetable; mature no longer edible

4

Protostele

a vascular cylinder that has no pith; common in roots and early vascular plants

5

Microphyll

the type of leaf that evolved from an enation (a small, projecting flap of tissue, thought to have been ancestor of leaves in lycophytes); present in lycophytes

6

Megaphyll (Euphyll)

a leaf that has evolved from a branch system; in ferns and all seed plants

7

Sporophylls

a leaf that bears sporangia

8

Strobili

synonym for cone

9

Homospory

a condition in which the life cycle of a plant contains only one type of spore

10

Heterospory

a condition in which the life cycle of a plant contains two types of spores