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Chapter 31.1. Reproductive Structures of Flowering Plants. AP Biology Spring 2011. Floral Structure and Function. Flowers form on a modified branch of the sporophyte when master genes in the _____________ are turned on. Floral Structure and Function. - PowerPoint PPT Presentation
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Reproductive Structures of Flowering Plants
AP BiologySpring 2011
Flowers form on a modified branch of the sporophyte when master genes in the _____________ are turned on
Flower parts are arranged in ________ of modified leaves on the end of the receptacle
________: outermost green, leaf-like parts arranged in a ring called the __________
________: the coloured parts located between the reproductive structures and the sepals, arranged in a ring called the ___________
_________: male parts, slender stalk (___________) capped with an _________, inside which pollen sacs enclose pollen grains
________: female parts, vessel shaped structures with an expanded lower ______ (with ovules), slender column (______), and an upper surface (______) for pollen landing
Meiosis of cells within flowers produces ____________ spores• _______________ in the anther • _______________ in the ovule
They then undergo mitosis to produce the haploid ____________ that ultimately become the _____ or _______
The egg and the sperm fuse to form the diploid zygote
As the zygote develops into a plant, the ______ is formed
___________________: have all four whorls (sepals, petals, stamens, and carpels)
________________: are missing one or more whorls
_____________: have both stamens and carpel (both sexes on one flower)
______________: produce either stamens or carpels and are known as either “male” or “female” flowers