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Chapter 30

Biol

TermDefinition
Ovule consists of a megasporangium megaspore and one or more protective integuments- will become the single seed
megasporangium structure of plant body that contains a female reproductive organ
megaspore larger of the 2 kinds of spores produced by heterosporous plants
integuments protective layering
pollination transfer of pollen to the parts of a seed plant containing the ovules- getting it to the part of the plant but not fertilization-no longer need water to travel for pollination
cones gymnosperms- naked seeds and seeds that are exposed on sporophylls that form cones
flowers angiosperms are seed plants with reproductive structures called flowers structure- specialized shoot with up to 4 types of modified leaved function-sexual reproduction
Sepal enclose the flower
petal brightly colored and attracts pollinators
stamens -produce pollen -stalk called a filament -a sac called an anther- which is where the pollen is produced
carpels produce ovules
fruits structure-typically consists of a mature ovary but can also include other flower parts function- protect seeds and aide in their dispersal -can be fleshy or dry
filament long stem leading up to the anther
anther where pollen is produced
carpel -ovary at the base -style leading up to the stigma -where pollen is received
ovary found at the base of the style
style between the stigma and the ovary
stigma most external piece at the end of the style -where the pollen lands
cross-pollination most flowers have mechanisms to ensure cross pollination between flowers from different plants of the same species
micropyle ovule is entered by a pore called micropyle
double fertilization occurs when pollen tube discharges 2 sperm into female gametophyte within an ovule
endosperm one sperm fertilizes the egg while the other combines with 2 nuclei in the central cell of the female gametophyte -initiates development of food storing endosperm
cotylendons within the seed the embryo consists of a root and 2 seed leaves called cotylendons
Created by: gracelew
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