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38 terms

flower structures and reproduction

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Seed develops in a cone (evergreen)
Gymnosperm
Seed produced in flowers and subsequent fruits
Angiosperm
Contains monoploid sperm cells aka pollen
Anther
Stalk that holds the anther
Filament
Grains that are monoploid sperm and is composed of two cells
Pollen
The male structures of flower reproduction
Stamen
Sticky to catch and hold pollen
Stigma
Where pollen burrows a pollen tube to reach the ovule
Style
Contains ovules, develops into a fruit
Ovary
A monoploid female gamete, develops into a seed
Ovule
The female structures of flower reproduction
Pistil
Supports flower, connects it to stem
Pedicel
Large end of pedicel, closest to flower
Receptacle
Leaf-like structures that surround base of flower and protect the bud
Sepal
Refers to the complete circle of sepals
Calyx
Surround the reproductive structures and attract pollinators
Petal
Refers to all the petals together
Corolla
Divides to form 2 monoploid sperm which travel down the pollen tube to fertilize the ovule
Generative cell
Forms the pollen tube
Tube cell
The transfer of pollen grains from the anther to the stigma
Pollination
When pollen of one plant is received by the stigma of the same plant
Self-pollination
When pollen of one plant is received by the stigma of another plant
Cross-pollination
Water, wind, insects, birds
Method of pollination
a sugary liquid secreted by flowers to attract insects or birds for pollination and causes the pollen to stick on them
Nectar
The union of pollen and ovule
Fertilization
When 1 sperm fuses with the egg to form a zygote and 1 sperm fuses with 2 polar nuclei to become endosperm; occurs in flowering plants
Double fertilization
Becomes food for developing plant embryo
Endosperm
Protects the seed
Seed Coat
Develops into lower stem and roots
Hypocotyl
Develops into upper stem and leaves
Epicotyl
Food source for developing seed
Cotyledon
Plants that have seeds with one cotyledon (corn)
Monocot
Plants that have seeds with two cotyledons (beans, nuts)
Dicot
To begin to grow
Germination
Proper temperature, sufficient oxygen for respiration, moisture
Conditions for germination
An increase in size and/or number of cells; occurs in meristems
Growth
Found in tips of roots and stems; responsible for growth in length
Apical
Found between xylem and phloem; responsible for growth in diameter
Lateral (cambium)