Flowering Plants

by CAThornton
Last updated 6 years ago

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Life Cycle of Flowering Plants-When seeds are dispersed from the parent plant they can either lay dormant or begin to grow.1. Germination –When conditions are right, the seed begins to grow roots grow down while the stems and leaves grow up.2. Plant Development – The seed grows into a mature plant with the structures necessary to produce more plants.3. Pollination - When pollen from the stamen (male part) is transferred to the pistil, pollination occurs.4. Fertilization - Then the pollen enters the ovule (female part) where fertilization occurs.5. Seed Production – The fertilized ovule develops into a seed. A fruit (fleshy like an apple, a pod like a pea, or a shell like a peanut) develops to protect the seed. Seeds are structures that contain theyoung plant surrounded by a protective covering.

Flowering Plants have special structures for defense, survival, and reproduction.DefenseThorns – sharp outgrowths that defend the plant from being eaten by animalsPoisons –Fruits and leaves with poisons so they are not eaten by animals. Examples are poison oak, poison ivy, sumac.Thigmotropism – the ability to close its leaves when touchedSurvivalLeaves – Leaves are the site for food production. Photosynthesis, respiration, and transpiration takeplace in leavesStems – Stems support the plant and hold the leaves up for light. They transport water from the roots to the leaves in xylem tissue. They transport food from the leaves to the othergrowing parts of the plant through phloem. Stems also function as food storage sites.Roots – Roots anchor the plant in the ground, absorb water and nutrients from the soil, and store extra food for the plant. Root hairs help increase the surface area of the root so it can absorb more water and nutrients. There are two types of roots:Fibrous Roots – consist of several main roots that branch off to form a mass of roots (corn, grass, some trees)Taproots – consist of one large, main root with smaller roots branching off (carrots, dandelions, cacti) Seeds have special structures that allow them to be dispersed by wind, water, or animals. Theseed coat helps protect the embryo from injury and also from drying out.ReproductionFlowers – Flowers produce seeds. Many flowers contain male and female parts needed to produce new flowers. Flower petals are often colorful or have a scent to attract insects and other animals.Stamen – The stamen are male parts of the flower that have an anther on a stalk (filament).The anther produces pollen that contain the sperm cells.Pistil – The female part of the flower that contains:Ovary –contains the ovules where the egg cells are producedStigma – the sticky top where the pollen grains landStyle – the pollen tube grows down this stalk after pollination happensSeeds – Seeds are fertilized ovules from which new plants form. A fruit that formsfrom the ovary often protects the seeds (apple, peach, pear) .


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