Bio 1111 Ch29 Land Plants

Cuticle

Waxy film covering the epidermis of many plants

Stomata

Pores that control gas exchange, and helps regulate water loss

Guard Cell

Specialized cell that use turgidity to open and close the pore

Vascular Tissue

Transport water and nutrients throughout plants body

Xylem

Transport tissue, like wood, that transports water and minerals

Tracheids

Long cells that help carry water up from roots

Primary Cell wall

Exterior cell wall made of cellulose

Secondary Cell wall

Interior cell wall made of cellulose and other materials

Phloem

Transport tissue that transports sugar, amino acids, and other nutrients

Roots

Organ of vascular plants that lie below ground, and absorb water and nutrients

Leaves

Organ of vascular plants that specialize for photosynthesis

Microphylls

Small leaves supported by singular strand of vascular tissue

Megaphylls

Leaves with highly branched vascular systems

Alteration of Generations

Life cycle in which both the diploid and halpoid stages are multicellular

Gametophyte

haploid, multicellular stage of life cycle that produces gametes

Sporophyte

Diploid, multicellular stage of life cycle that produces spores by meiosis

Spore

Unit of asexual reproduction, generally haploid and unicellular

Sporophylls

Modified leaves that bear sporangia, enclosed structures in which spores are formed

Homospory

Only one type of spore is produced

Heterospory

Two distinct types of spores are produced