Biology II Chapter 38

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Question Answer
3 F's of angiosperms Flowers, double Fertilization, and Fruits
Carpelscontain ovules (immature seeds) in their swollen bases, embryo sacs (female gametophytes) develop from megaspores within ovule.
Petalshelp attract pollinators
Sepalsprotect the floral bud
Stamensbear anthers in which haploid microspores develop into pollen grains containing a male gametophyte.
Flowers produced by the sporophyte, function in sexual reproduction.
Pollinationprecedes fertilization, the placing of pollen on the stigma of a carpel.
Double Fertilizationrequires 2 sperm, one sperm fertilizes the egg, and the other combines with the polar nuclei
Seed coatencloses the embryo
Fruita mature ovary
Callusa mass of dividing undifferentiated totipotent cells formed at the end of a cut shoot
Stockthe plant that provides the roots in a graft
Scionthe twig grafted onto the stock
Simple fruitdevelops from a single carpel of one flower (pea,lemon,peanut)
Aggregate fruitdevelops from many separate carpels of one flower (raspberry,blackberry, strawberry)
Multiple fruitdevelops from many carpels of the many flowers that form an inflorescence (pineapple, fig)
Accessory fruitdevelops largely from tissues other than ovary (apple; ovary embedded in fleshy receptacle)
Inflorescencesshowy clusters of flowers
Complete flowersflowers that posses all four basic floral organs
Incomplete flowersflowers which lack of one or all of the basic floral organs