Ch 20 & 21

Question 1

Sorus

Answer 1

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

Question 2

Bisexual gametophyte

Answer 2

.

Question 3

Fiddlehead

Answer 3

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

Question 4

Protostele

Answer 4

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

Question 5

Microphyll

Answer 5

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

Question 6

Megaphyll (Euphyll)

Answer 6

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

Question 7

Sporophylls

Answer 7

a leaf that bears sporangia

Question 8

Strobili

Answer 8

synonym for cone

Question 9

Homospory

Answer 9

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

Question 10

Heterospory

Answer 10

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