Eukaryota

Bryce Abstract posted on May 13, 2017
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Description


A eukaryote (/juːˈkæri.oʊt/ or /juːˈkæriət/ yoo-karr-ee-oht or yoo-karr-ee-ət) is any organism whose cells have a nucleus and other organelles enclosed within membranes. Eukaryotes belong to the taxon Eucarya or Eukaryota. The defining feature that sets eukaryotic cells apart from prokaryotic cells (Bacteria and Archaea) is that they have membrane-bound organelles, especially the nucleus, which contains the genetic material and is enclosed by the nuclear envelope. The presence of a nucleus gives eukaryotes their name, which comes from the Greek εὖ (eu, "well" or "true") and κάρυον (karyon, "nut" or "kernel"). Eukaryotic cells also contain other membrane-bound organelles such as mitochondria and the Golgi apparatus. In addition, plants and algae contain chloroplasts. Eukaryotic organisms may be unicellular or multicellular. Only eukaryotes form multicellular organisms consisting of many kinds of tissue made up of different cell types. Eukaryotes can reproduce both asexually through mitosis and sexually through meiosis and gamete fusion. In mitosis, one cell divides to produce two genetically identical cells. In meiosis, DNA replication is followed by two rounds of cell division to produce four daughter cells (haploid cells) each with half the number of chromosomes as the original parent cell. These act as sex cells (gametes – each gamete has just one complement of chromosomes, each a unique mix of the corresponding pair of parental chromosomes) resulting from genetic recombination during meiosis. The domain Eukaryota appears to be monophyletic, and so makes up one of the three domains of life. The two other domains, Bacteria and Archaea, are prokaryotes and have none of the above features. Eukaryotes represent a tiny minority of all living things. However, due to their generally much larger size, their collective worldwide biomass is estimated to be about equal to that of prokaryotes. Eukaryotes evolved approximately 1.6–2.1 billion years ago (during the Proterozoic eon).

Comments (20)


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jendellas

7:52AM | Sat, 13 May 2017

Interesting & lovely image!!

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eekdog

9:35AM | Sat, 13 May 2017

Interesting design.

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Faemike55

9:40AM | Sat, 13 May 2017

Great image and fabulous information

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Jean_C

9:48AM | Sat, 13 May 2017

Superbe graphisme!

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Leije

10:35AM | Sat, 13 May 2017

Beau graphisme !

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tallpindo

11:00AM | Sat, 13 May 2017

Something to look for off planet.

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jeffy3ds

3:02PM | Sat, 13 May 2017

Superbe image !!

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Richardphotos

8:48PM | Sat, 13 May 2017

never seen any but your illustration is as good as any. great info

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anitalee

11:57PM | Sat, 13 May 2017

Cool

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BryceHoro

2:22AM | Sun, 14 May 2017

Great depiction of the idea of Eukaryotes.

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sossy

4:54AM | Sun, 14 May 2017

impressive lesson and wonderful design 😀

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bebopdlx

12:47PM | Sun, 14 May 2017

Nice effects and work, cool info

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virginiese

1:37PM | Sun, 14 May 2017

Très joli travail ! Bravo !

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blankfrancine

2:02PM | Sun, 14 May 2017

Fine Brycean abstraction.

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RodS

2:24PM | Sun, 14 May 2017

Fascinating information, and a great render, Real! Someday, we will encounter something like this on another world. It's only a matter of time..

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DukeNukem2005

12:43PM | Mon, 15 May 2017

It is amazing!

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rayag

3:20AM | Tue, 16 May 2017

very interesting !

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mininessie

5:39PM | Fri, 19 May 2017

great!

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claude19

1:01PM | Sun, 21 May 2017

magnifique création ! superbe graphisme !!!

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Glendaw

1:07PM | Mon, 22 May 2017

What a exquisite and delicate image to compliment your information, well done.


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