Details Title: Observing God's World 1.3 Flower, Fruit, and Seed Description: Flashcards for A Beka Observing God's World Ch. 1.3 Total Flash Cards: 25 Created: 09/21/2009 14:21:40		New Users: To study from this flashcard set, or to create your own your own study flash cards, REGISTER HERE. Existing Users: CLICK HERE. Additional Plant Sciences Flashcards
Cards in this set: Term petals Definition The brightly colored, most noticeable part of a flower.   They attract bees and other creatures with their bright colors. Term sepals Definition Sepals usually look like smaller, green versions of the petals and are located beneath them, although some flowers have sepals the same size and color as the petals themselves. Sepals enclose and protect a developing flower until it opens up as a fully formed blossom. Term bud Definition A developing flower. Term bract Definition Some flowers are bordered by colorful leaves called bracts. Bracts serve the same purpose as petals, to attract insects to the flower, but have a different structure. In some cases the bracts take the place of petals, such as the red or white bracts found on poinsettias. "The flowes of the dogwood tree have very small petals, which are surrounded with white bracts, which give the tree its spectacular appearance when it is in bloom. Term pistil Definition In the middle of the flower is a long tube called the pistil. Term stigma Definition The flat tip of the pistil. It is specially designed to recieve pollen. Term ovary Definition The fat base of the pistil. It contains ovules. Term ovules Definition Undeveloped seeds. Ovules are found in the ovary of a flower. Term stamens Definition Usually positioned in a circle around the pistil. Stamens hold pollen. Term pollen Definition Dustlike yellow grains found on the stamens of flowers. Term sperm cell Definition Found inside pollen. Term egg cell Definition Found inside the undeveloped seeds, called ovules. Term fertilization Definition When a sperm cell from a pollen grain unites with an egg cell stored inside an ovule. A flower may be fertilized by its own pollen or pollen from another flower. Term pollen tube Definition When a pollen grain is deposited on the stigma, it goes into action. The hard outter casing on the pollen grain cracks open, and a special cell inside begins to lengthen, burrowing its way downward through the pistil and into an ovule. This cell forms a pollen tube down which two sperm cells travel from the pollen grain to the egg cell inside the ovule. When a sperm cell unites with the egg cell, the ovule begins to develop into a seed. Term pollination Definition The transfer of pollen from the stamen to the pistil. Term pollinators Definition Bees and other instects such as flies, wasps, and butterflies are the most frequent pollinators, but birds, bats, and the wind also pollinate flowers. Term nectar Definition A sweet liquid stored in the bottom of blooms. Bees, butterflies, and humming birds drink nectar. Term fruit Definition After fertilization has taken place, the plant gathers a supply of food around the seeds, and the ovary swells, eventually the ovary becomes a fruit. Anything that forms from the ovary of a flower. Nuts, beans, peas, olives, and grains are all fruits. Term dormant Definition Inactive. Seeds need both moisture and warmth to bring them out of dormancy. Some seeds remain contain chemicals that keep them dormant until they have been exposede to a long period of cold, others have a hard coat that must decay before the seedling inside can get enough moisture to start growing. Most seeds lie dormant over the winter and then begin to grow in the spring, when the ground becomes warm once again. Term embryo Definition A miniature undeveloped plant, made up of a tiny shoot that will become the stem and leaves, and a small root that will develop into the root system. Term cotyledons Definition Each seed has one or two cotyledons that contain stored food for the growth of the plant. Corn is a example of a seed with one cotyledon, while beans and peanuts have two. Term seedcoat Definition The outer covering of a seed which protects the cotyledon(s) and embryo. Term botanist Definition A scientist who studies plants. Term hybrid Definition A variety of plant or animal produced by crossing two kinds of plants or animals. This is how many of the varieties of food we eat or flowers we plant are created. Term Carolus Linnaeus Definition A Swedish botanist also known as Carl Linnaeus (1701-1778) He is known as the "Father of Taxonomy" because of his work in classifying plants and animals. He invented a hierarchical system of naming biological speicimens.