The difference between plant and animal comes down to cell structure. Animal cells do not have cell walls and have different structures than plant cells. Plant cells only are in rectangular shapes but animal cells are either circular‚ irregular or defined shapes depending on the type of cell. Plants have 3 basic organs; roots‚ stems‚ and leaves. Plants lack a brain and all the organs that animals have to carry out metabolic functions as animals take their carbon from organic substances and plants
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Internal Structure Of A Plant PLANT CELL STRUCTURE Plant cells are classed as eukaryotes organisms‚ because they have a membrane enclosed nuclei and organelles. Here is a diagram of a plant cell;  Cytoplasm Most chemical reactions take place here. It helps the cell maintain it’s shape. Nucleus The nucleus has two main roles. Firstly it contains all the cells genetic information. Secondly it coordinates the cell’s activities‚ which include growth‚ intermediary metabolism‚ protein synthesis
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LIFE ON EARTH REVISION Analysis of the oldest sedimentary rocks provides evidence for the origin of life. - Identify the relationship between the conditions on early Earth and the origin of organic molecules. - Formation of the organic molecule was the first event in the evolution of life. - The molecules provided a building block for cell formation and the food for the earliest life. - Present day life’s atmosphere contains: - Oxygen - Water - Carbon
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Protozoans (from Greek πρῶτον proton "first" and ζῷα zoa "animals"; singular protozoon) are microorganisms classified as unicellular eukaryotes.[1] While there is no exact definition of the term "protozoan"‚ most scientists use the word to refer to a unicellular heterotrophic protist‚ such as an amoeba or a cilipoopate. The term algae is used for microorganisms that photosynthesize. However‚ the distinction between protozoa and algae is often vague. For example‚ the alga Dinobryon has chloroplasts
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Part I INTRODUCTION TO MICROBIOLOGY 1 The Evolution of Microorganisms and Microbiology CHAPTER OVERVIEW This chapter introduces the field of microbiology and discusses the importance of microorganisms not only as causative agents of disease‚ but also as important contributors to food production‚ antibiotic manufacture‚ vaccine development‚ and environmental management. It presents a brief history of the science of microbiology and an overview of the microbial world. The origin of life and
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smallest life organisms around. There are 2 types of bacteria. 1 is Archbacteria. 2. Eubacteria. Protists Protists are organisms in the kingdom Protista. The organisms are eukaryotes which means they are made up of single or multiple cells which all contain a nucleus and a membrane. protists are a cool group of eukaryotes that cannot be classified as animals‚ plants‚ or fungi. Organisms in the Protista kingdom include amoebae‚ euglena and slime molds. Protist move throuout the slime molds and
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BSC2011C Final Review Unit 1 Review Ch. 25‚ 22‚ 23‚ 24‚ 26‚ 19‚ 27 Ch. 25 1. Life is metabolism and heredity. Metabolism is the mechanism that creates order and complexity from chaos‚ by acquiring and expending energy. Heredity is the ability of an organism to copy itself and it is broken down into: i. Multiplication‚ ii. Inheritance‚ iii. Variation. 2. DNA codes via RNA for 20 of naturally occurring amino acids. Amino Acids are the building blocks of proteins and bodies. DNA stores and transmits
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w Cambridge Pre-U Teacher Guide Cambridge International Level 3 Pre-U Certificate in BIOLOGY Available for teaching from September 2011 w w e tr .X m eP e ap .c rs om Cambridge Pre-U Teacher Guide University of Cambridge International Examinations retains the copyright on all its publications. Registered Centres are permitted to copy material from this booklet for their own internal use. However‚ we cannot give permission to Centres to photocopy any material that is acknowledged to a
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1. _______________________________________________. (Schleiden and Schwann) 2. _________________________________________________________________. 3. __________________________________________________________.(Virchow) PROKARYOTE VS. EUKARYOTE CELLS Cell Structures I. CELL _____________ (The __________ Bilayer) A. Function: ______________________________________________ 1. _____________ _________ – lets some things in & keeps others out B. Structure – Composed
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energy-requiring activities of the cell. Chloroplast → (in green plant cells) a plastid that contains chlorophyll and in which photosynthesis takes place. Chromatin → the material of which the chromosomes of organisms other than bacteria (i.e.‚ eukaryotes) are composed. It consists of protein‚ RNA‚ and DNA. Chromosome → a threadlike structure of nucleic acids and protein found in the nucleus of most living cells‚ carrying genetic information in the form of genes. Cristae → The infoldings or
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