Angiosperms

An _________angiospermrootovarypetal is a group of seed plants. All angiosperms, or _________evergreensmossesseedsflowering plants , share two important characteristics. First, they produce flowers. Second, in contrast to gymnosperms, which produce uncovered seeds, angiosperms produce seeds that are enclosed in _________rootsfruitspetalsseed coats.

Flowers come in all sorts of shapes, sizes, and colors. But despite their differences, all flowers have the same function - reproduction. A flower is the reproductive structure of an angiosperm. A flower bud is enclosed by leaf-like structures called _________sepalspetalsseed coatstamen that protect the developing flower. Most flowers have _________sepalsseed coatstamenpetals; colorful, leaf-like structures. Within the petals are the flower's male and female _________reproductivecolorfulsmalllarge parts. Thin stalks topped by small knobs inside the flower are _________sepalspetalsseed coatstamens, the male reproductive parts. The thin stalk is called the _________sepalspetalsstamenfilament. Pollen is produced in the knob, or _________sepalspetalsantherpistil, at the top of the stalk. The female parts, or _________sepalspetalspistilstamen, are found in the center of most flowers. The sticky tip of the pistil is called the _________stigmasepalpetalstamen. A slender tube, called a style, connects the stigma to the _________stamenstigmapetalovary, a hollow structure at the base of the flower. The ovary contains one or more _________stamenovulesstigmapetal. An ovary is a flower structure that protects _________stamenstigmaseedspetals as they develop.

For angiosperms to reproduce, first, pollen falls on a flower's _________seedstamenpetalstigma. In time, the sperm cell and egg cell join together in the flowers ovule. The zygote develops into the embryo part of the seed. As the seed develops the ovary changes and eventually becomes a fruit, a ripened _________petalovaryseedstamen and other structures that enclose one or more seeds.

Angiosperms are divided into two major groups: monocots and dicots. _________MonocotsDicotsTricots are angiosperms that have only one seed leaf. Grasses, including corn, wheat and rice, and plants such as lilies and tulips, are monocots. _________MonocotsDicotsTricots produce seeds with two seed leaves. Dicots include plants such as roses, violets and dandelions.