Chapter 30 Vocab Flashcards
Sporophytes
The dominant, diploid generation of angiosperms
Gametophytes
Male or female haploid plants that are only a few cells and rely entirely on sporophytes for nutrition
Fertilization
The fusion of gametes resulting in diploid zygotes
Receptacle
The part of the stem that floral organs are attached to
Carpel
The female reproductive feature
Stamens
The male reproductive feature
Petals
The brightly colored portion of the plant that advertises it to pollinators
Sepals
Enclose and protect unopened buds and resemble leaves
Ovary
Female reproductive organ that encloses the ovule
Style
The neck of a carpel
Stigma
The sticky part at the top of the style that captures pollen
Ovules
Unfertilized “eggs” of the carpel
Filament
Stalk-like structure of the stamen
Anter
A terminal organ on top of the filament that contains and releases pollen
Complete flowers
Flowers that contain all 4 basic organs
Incomplete flower
Flowers lacking one or more parts of the flower
Unisexual flowers
Flowers which contain the reproductive organs of only one gender
Inflorescence
Clusters of flowers
ABC hypothesis
Theory that explains how 3 genes direct formation of 4 organs A: sepals AB: petals BC: stamens C: carpels
Embryo sac
Forms within a fertilized ovule
Megasporangium
The tissue within the ovary that the ovules develop in
Integuments
Protective tissue that surround the magasporangium
Micropyle
A small gap in the integuments
Megaspores
Cell within megasporangium divides into 4 MEGASPORES, only one of which survives to divide 3 times by mitosis w/o cytokenisis
Microsporangia
Pollen sacs found in anters
Microsporocytes
Diploid cells within the pollen sac
Microspores
Haploid cells that truly from the microsporocyte going though meiosis
Pollen grain
The microspore along with the tube cell it creates via division
Pollen tube
A tube cell which caries pollen grain, as it divides into two sperm cells, to the ovary
Pollination
The transfer of pollen from an anther to a stigma
Endosperm
A food storing tissue in the seed caused by one of the sperms joining with the polar nuclei and forming a triploid (3n) nucleus
Double fertilization
One sperm joins egg and forms zygote, other joins polar nuclei and forms endosperm.
Suspensor
A thread if cells that anchor embryo to parent cell
Dormancy
A state of no metabolic activity
Seed coat
A hard protective case that encloses the embryo and food
Hypocotyl
Embryonic axis located under where cotyledons are attached
Radicle
Embryonic root
Epicotyl
Part of embryonic axis above cotyledons and below the first leaves
Plumule
Epicotyl, young leaves, and apical meristem collectively
Coleoptile
Sheath covering the shoot of grass seed
Coleorhiza
sheath protecting roots of grass seed
Inbibition
The uptake of water due to the low water potential of the dry seed
Fruit
The flower develops into a FRUIT which protects enclosed seeds and aids In dispersal
Pericarp
The thick wall of the fruit
Simple fruit
Derived from a single carpel or fused carpels
Aggregate fruit
Results from a single flower that has more than one carpel
Multiple fruit
Inflorescence of flowers that join ovaries as they grow
Accessory fruit
Other parts of the fruit besides the ovary form the “fruit”
