Flowering plants (angiosperms): [Essay Example], 568 words GradesFixer

Haven't found the right essay?

Get an expert to write your essay!


Professional writers and researchers


Sources and citation are provided


3 hour delivery

This essay has been submitted by a student. This is not an example of the work written by professional essay writers.

Flowering Plants (angiosperms)

Download Print

Pssst… we can write an original essay just for you.

Any subject. Any type of essay.

We’ll even meet a 3-hour deadline.

Get your price

121 writers online

Download PDF

Flowering plants (angiosperms) have ovules and seeds completely enclosed within carpels. The term angiosperms is derived from two Greek words angeion, meaning “vessel”, and sperma, meaning “seed”. The vessel is the carpels that become ovaries that become fruits. There is one phylum of flowering plants (Magnoliophyta) and it is divided into two classes which are dicots (Magnoliopsida) and monocots (Liliopsida).

Flowering plants are believed to have evolved from now-extinct gymnosperm ancestor. Most contemporary botanists from pteridosperms and that the first flowers had many separate, flattened parts spirally ordered on an extended receptacle. Flowering plants produce two kinds of spores which are heterosporous. Its gametophytes develop in separate structures. The female gametophyte (megagametophyte) develops in the ovule. Integuments, which later become a seed coat, surround the megagametophyte. Pollen grains developed in anthers become male gametophytes. Pollination is the transfer of pollen grains from an anther to stigma; it is brought about by insects, wind, and other agents. After pollination, a pollen tube may grow from a pollen grain to the female gametophyte; the tube nucleus remains at its tip, and the generative cell divides, producing two sperm nuclei. Following the contents discharge of the pollen tube into the female gametophyte, a sperm unites with the egg, forming a zygote; the other sperm simultaneously unites with the two central cell nuclei, forming 3x endosperm.

The nutritive endosperm tissue may become part of the seed or absorbed by the seed’s embryo. Due to variations in how a female gametophyte develops, some flowering plants produce 5x, 9x, or 15x endosperm tissue. Some artificial grouping of flowers to assist identification does not reflect natural relationships. Sources of evidence used to try to group plants naturally include fossils, which suggest the flowering plants first appeared about 160 million years ago. Primitive flowering plants had simple leaves and numerous, spirally arranged flower parts that were not fused to each other; they possessed both stamens and pistils and were radially symmetrical (regular). Specializations include a decrease in the number of parts, fusion of parts, appearance of compound pistils composed of several individual carpels, inferior ovaries, bilateral symmetry (irregular flowers), and unisexual flowers.

Monoecious species have both male and female flowers on the same plants; dioecious species have male and female flowers on separate plants. Bee-pollinated flowers are delicately sweet and fragrant and tend to be blue or yellow in color. Beetle-pollinated flowers tend to have stronger odors and are usually white or dull in color. Some fly-pollinated flowers expel foul odors. Moth-pollinated flowers tend to be white or yellow. Bird-pollinated flowers are usually bright red or yellow and have much nectar but little odor. Most orchids produce pollen grains in pollinia that adhere or clamp onto parts of visiting insects. The flowers of some orchid species have developed bizarre pollination mechanisms. Herbaria are fundamentally collection of dried, pressed, or otherwise preserved plants, fungi, and algae arranged so that specific specimens may be readily located. Properly preserved plants may last for hundreds of years. A plant to be pressed is placed in a plant press between sheets of newspaper and absorbent material. Dry specimens are mounted to sheets of high-quality paper, with a label giving collection information.

Plant parts may be pressed for art work, place mats, and so on. Flowers may be preserved three-dimensionally. Because so many plants are now on rare and endangered species lists, collectors should try to limit their future collecting to photographs as much as possible.

Remember: This is just a sample from a fellow student.

Your time is important. Let us write you an essay from scratch

100% plagiarism free

Sources and citations are provided

Find Free Essays

We provide you with original essay samples, perfect formatting and styling

Cite this Essay

To export a reference to this article please select a referencing style below:

Flowering plants (angiosperms). (2019, January 15). GradesFixer. Retrieved November 30, 2020, from https://gradesfixer.com/free-essay-examples/flowering-plants-angiosperms/
“Flowering plants (angiosperms).” GradesFixer, 15 Jan. 2019, gradesfixer.com/free-essay-examples/flowering-plants-angiosperms/
Flowering plants (angiosperms). [online]. Available at: <https://gradesfixer.com/free-essay-examples/flowering-plants-angiosperms/> [Accessed 30 Nov. 2020].
Flowering plants (angiosperms) [Internet]. GradesFixer. 2019 Jan 15 [cited 2020 Nov 30]. Available from: https://gradesfixer.com/free-essay-examples/flowering-plants-angiosperms/
copy to clipboard

Sorry, copying is not allowed on our website. If you’d like this or any other sample, we’ll happily email it to you.

    By clicking “Send”, you agree to our Terms of service and Privacy statement. We will occasionally send you account related emails.


    Attention! this essay is not unique. You can get 100% plagiarism FREE essay in 30sec

    Recieve 100% plagiarism-Free paper just for 4.99$ on email
    get unique paper
    *Public papers are open and may contain not unique content
    download public sample

    Sorry, we cannot unicalize this essay. You can order Unique paper and our professionals Rewrite it for you



    Your essay sample has been sent.

    Want us to write one just for you? We can custom edit this essay into an original, 100% plagiarism free essay.

    thanks-icon Order now

    Hi there!

    Are you interested in getting a customized paper?

    Check it out!
    Having trouble finding the perfect essay? We’ve got you covered. Hire a writer

    GradesFixer.com uses cookies. By continuing we’ll assume you board with our cookie policy.