Chapter 30 Vocab Flashcards Preview

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Flashcards in Chapter 30 Vocab Deck (48):
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Gametophytes

Male or female haploid plants that are only a few cells and rely entirely on sporophytes for nutrition

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Sporophytes

The dominant, diploid generation of angiosperms

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Fertilization

The fusion of gametes resulting in diploid zygotes

3

Receptacle

The part of the stem that floral organs are attached to

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Carpel

The female reproductive feature

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Stamens

The male reproductive feature

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Petals

The brightly colored portion of the plant that advertises it to pollinators

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Sepals

Enclose and protect unopened buds and resemble leaves

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Ovary

Female reproductive organ that encloses the ovule

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Style

The neck of a carpel

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Stigma

The sticky part at the top of the style that captures pollen

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Ovules

Unfertilized "eggs" of the carpel

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Filament

Stalk-like structure of the stamen

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Anter

A terminal organ on top of the filament that contains and releases pollen

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Complete flowers

Flowers that contain all 4 basic organs

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Incomplete flower

Flowers lacking one or more parts of the flower

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Unisexual flowers

Flowers which contain the reproductive organs of only one gender

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Inflorescence

Clusters of flowers

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ABC hypothesis

Theory that explains how 3 genes direct formation of 4 organs
A: sepals
AB: petals
BC: stamens
C: carpels

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Embryo sac

Forms within a fertilized ovule

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Megasporangium

The tissue within the ovary that the ovules develop in

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Integuments

Protective tissue that surround the magasporangium

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Micropyle

A small gap in the integuments

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Megaspores

Cell within megasporangium divides into 4 MEGASPORES, only one of which survives to divide 3 times by mitosis w/o cytokenisis

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Microsporangia

Pollen sacs found in anters

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Microsporocytes

Diploid cells within the pollen sac

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Microspores

Haploid cells that truly from the microsporocyte going though meiosis

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Pollen grain

The microspore along with the tube cell it creates via division

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Pollen tube

A tube cell which caries pollen grain, as it divides into two sperm cells, to the ovary

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Pollination

The transfer of pollen from an anther to a stigma

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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

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Double fertilization

One sperm joins egg and forms zygote, other joins polar nuclei and forms endosperm.

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Suspensor

A thread if cells that anchor embryo to parent cell

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Dormancy

A state of no metabolic activity

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Seed coat

A hard protective case that encloses the embryo and food

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Hypocotyl

Embryonic axis located under where cotyledons are attached

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Radicle

Embryonic root

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Epicotyl

Part of embryonic axis above cotyledons and below the first leaves

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Plumule

Epicotyl, young leaves, and apical meristem collectively

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Coleoptile

Sheath covering the shoot of grass seed

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Coleorhiza

sheath protecting roots of grass seed

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Inbibition

The uptake of water due to the low water potential of the dry seed

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Fruit

The flower develops into a FRUIT which protects enclosed seeds and aids In dispersal

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Pericarp

The thick wall of the fruit

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Simple fruit

Derived from a single carpel or fused carpels

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Aggregate fruit

Results from a single flower that has more than one carpel

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Multiple fruit

Inflorescence of flowers that join ovaries as they grow

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Accessory fruit

Other parts of the fruit besides the ovary form the "fruit"