Chapter 31.1

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