seed producing vascular plants are _______ generation dominant
the spore-producing individual or phase in the life cycle of a plant having alternation of generations
"naked seed" (seeds not covered by a fruit, seeds released from cones; nonflowering)
How many species of cycads?
Flagellated sperm; frond-like leaves; dioecious (separate sexes); evergreen are all characteristics of _______ .
______ is not needed for reproduction in seed producing vascular plants even though 2 phyla contain sperm which are flagellated; sperm will travel by eggs by pollination contained in pollen
In seed producing vascular plants, _____ is packaged in seed used for dispersal of the species
only one living species (ginkgo biloba)
Flagellated sperm; broad-flat deciduous leaves, dioecious
Referring to a plant species that has staminate and carpellate flowers on separate plants.
"the conifers" (pines, cedars, cypress, fir, spruce, etc.)
most are evergreen with needle-like leaves;
do not need water for reproduction;
wind carried pollen;
pollination vs. fertilization;
are all characteristics of _______ .
having male and female reproductive organs in the same plant or animal
"enclosed seed" (have flowers; flowering plants produce seeds at the base of a flower resulting in a fruit; only one division)
235,000 species; contains 2 classes: Monocotyledones and Eudicotyledones
"the monocots" 65,000 species (corn, lily, orchids, all grasses, etc.)
comprising seed plants that produce an embryo with a single cotyledon and parallel-veined leaves: includes grasses and lilies and palms and orchids
"the eudicots" 170,000 species (oaks, hickories, violet, holly, dogwood, birches, poplars, elms, poinsettias, coleus, begonia, roses, geraniums, etc.)
leaf veins form a parallel pattern
a seed that has one seed leaf and stored food outside the seed leaf; one cotyledon in seed
A "seed leaf" which develops as a part of the seed. It provides nutrients to the developing seedling and eventually becomes the first leaf of the plant.
flower parts in threes and multiples of three
two cotyledons in seed
leaf veins form a net pattern
flower parts in fours or fives and their multiples
Seed producing vascular plants have ________, therefore have xylem and phloem and roots, stems, and leaves
pollen lands on stigma. pollen grain releases tube cell. tube cell divides, formiing a pollen tube all the way to the ovary. generative cell releases two sperm. sperm travel down pollen tube for fertilization. tube enters microphyle.
ovules eventually develop into
the transfer of pollen from the male reproductive structures (the anthers) to the tip of a female reproductive structure (the pistil) of a flower in angiosperms or to the ovule in gymnosperms