Edexcel IGCSE Biology 復(fù)習(xí)筆記 1.2.1 Eukaryotic Organisms

Category: IGCSE課程, 國(guó)際課程, 教材筆記, 福利干貨 Date: 2022年6月29日下午3:11

Edexcel IGCSE Biology 復(fù)習(xí)筆記 1.2.1 Eukaryotic Organisms

Common Features of Eukaryotic Organisms: Basics

All living organisms can be grouped or 'classified' using a classification system that consists of?five kingdoms. These five kingdoms are:
- Animals
- Plants
- Fungi
- Protoctists
- Prokaryotes
The first four kingdoms in this list (the animals, plants, fungi and protoctists) can actually be?grouped together, as they are all?eukaryotic organisms?(also known as?eukaryotes)

The-Kingdoms-of-Eukarya

Animals, plants, fungi and protoctists are all eukaryotes

Eukaryotic organisms can be?multicellular or single-celled?and are made up of cells that contain a?nucleus?with a?distinct membrane

An-animal-and-plant-cell-as-seen-under-a-light-microscope

An animal cell (left) and plant cell (right) as seen under a light microscope. They are both eukaryotic cells as they both have a distinct membrane-bound nucleus.

Prokaryotic organisms?(also known as?prokaryotes) are in a?separate kingdom?and are?different?from eukaryotes as they are?always single-celled?and?do not contain a nucleus?(instead, the?nuclear material?of prokaryotic cells is found in the?cytoplasm)
- Bacteria?are prokaryotic organisms
Prokaryotic cells are substantially?smaller?than eukaryotic cells