BIO44 Unit 3

bryophytes

mosses/liverworts/hornworts

pterophytes

ferns

gymnosperms

conifers

angiosperms

flowering plants w/ seeds

sporophyte

2n, diploid

gametophyte

n, haploid

spores

haploid dispersal units produced by sporophytes; allows for germination w/o fertilization

pollen

male gametophyte in seed plants; delivers sperm w/o need for water; key land adaptation

seeds

embryo + food supply + protective coat; dormancy allows dispersal and stress survival

buds

compressed tissue w/ meristematic tissue; poised for fast growth

stomata

pores in epidermis surrounded by guard cells; regulate co2 intake and loss of water

xylem

dead hollow cells that conduct water and minerals upward; act as structural support

phloem

living sieve-tube cells + companion cells; conducts sugar and other organics throughout plant

endosperm

nutritive seed tissue that increases the efficiency with which food is stored in seeds of flowering plants (the flesh of a fruit)

ovule

sporangium that typically develops into a small egg, producing a gametophyte

integuments

the structure that encloses the ovule

endosporic gametophytes

gametes produced by spore-producing plants (heterosporous) that grow within the confines of the