What's the most successful type of plant?
Flowering plants. Why? As you know, flowers come in many different styles and colors, and many are visually pleasing. This aids in pollination. Also notice the anatomy of this Hibiscus flower. Each part has evolved to play a role in the life cycle.
, or flowering plants, are the most abundant and diverse plants on Earth. Angiosperms evolved several reproductive adaptations that have contributed to their success. Like all vascular plants, their life cycle is dominated by the sporophyte generation. A typical angiosperm life cycle is shown in
Life cycle of an angiosperm
The flower in
is obviously an innovation in the angiosperm life cycle.
form on the dominant
plant. They consist of highly specialized male and female reproductive organs. Flowers produce
that develop into
. Male gametophytes consist of just a few cells within a
grain and produce sperm. Female gametophytes produce eggs inside the ovaries of flowers. Flowers also attract animal
If pollination and fertilization occur, a diploid zygote forms within an ovule in the ovary. The zygote develops into an embryo inside a seed, which forms from the ovule and also contains food to nourish the embryo. The ovary surrounding the seed may develop into a fruit.
attract animals that may disperse the seeds they contain. If a seed germinates, it may grow into a mature sporophyte plant and repeat the cycle.
Life Cycle of a Flowering Plant
for additional information.
In flowering plants, the gametophyte generation takes place in a flower, which forms on the mature sporophyte plant.
Each male gametophyte is just a few cells inside a grain of pollen. Each female gametophyte produces an egg inside an ovule.
Pollination must occur for fertilization to take place. Zygotes develop into embryos inside seeds, from which the next sporophyte generation grows.
Use this resource to answer the questions that follow.
State the functions of flowers and fruits in angiosperm reproduction.
Create your own cycle diagram to represent the life cycle of a daisy.