biology * Behavioral * Ecology Evidence for evolution * Fossil record * Biogeography * Homoplasy * Selective breeding * Homologies * Experiment evidence of adaptation Fossil record * Complex organisms in younger rocks * Simple organism in older rocks Biogeography * Study of geographical distribution of extinct and modern species * Isolated continents Homoplasy (similar form- different origin) * Homoplastic- features are similar features not inherited
Premium Evolution Species Bacteria
ZAINAB RAZZAQ IQRA MUBEEN SABIKA RAFIQ CLONING Content Introduction History Ways of Cloning Types Advantages Disadvantages Human Cloning What Is Cloning? Cloning is the process of creating genetically identical organisms Asexual organisms are reproduce by cloning themselves Human identical twins are clones of each other Clones have identical DNA but can have different personalities History of Cloning 1938 –Hans Spemann proposes a “fantastic experiment” – to replace the
Premium Cloning Bacteria Organism
Biology Fall 2011-2012 Exam Review [pic][pic] The graphs above show the results of two separate experiments on the same species of plant. Students now want to determine how the use of rainwater or bottled water affects the growth of this plant. Which conditions should be used for optimal growth as the two water types are tested? Answer:_______________________________________________________________________________________________________________ WHY?____________________________________
Free Cell Eukaryote Bacteria
Konstantin Mereschkowsky was the first person to discover the chloroplast. He discovered the chloroplast while working with lichens. Chloroplasts evolved from “swallowed up” prokaryotes(Unicellular organisms : bacteria) that once lived as independent organisms. At some point‚ a eukaryote (A eukaryote is any organism whose cells contain a
Premium Bacteria DNA Eukaryote
Archaebacteria Description: Archaea are a group of microscopic organisms that are single-celled prokaryotes. They can exist in extreme conditions‚ such as extremely hot‚ acidic‚ or alkaline environments and are not reliant on any one source energy. Some archaebacteria sustain themselves by consuming hydrogen gas or metal ions‚ however other archaebacteria live inside more complex organisms. Divergent Event: Aechaebacteria have a long evolutionary line‚ which makes it difficult for experts to
Premium Bacteria Archaea Organism
THE 5 KINGDOMS OF LIFE- the amazing diversity of living systems 1. the Monera The five-kingdom system of classification for living organisms‚ including the prokaryotic Monera and the eukaryotic Protista‚ Fungi‚ Plantae and Animalia is complicated by the discovery of archaebacteria. The prokaryotic Monera include three major divisions: The regular bacteria or eubacteria; the cyanobacteria (also called blue-green algae); and the archaebacteria. Lipids of archaebacterial cell membranes differ considerably
Premium Eukaryote Bacteria DNA
Microbial Diversity and Ubiquity Microorganisms are microscopic organisms that are so small that that they can only be visualized by the aid of a compound-brightfield microscope. While we generally cannot see individual microorganisms with the naked eye‚ they are present in virtually every habitat known to man. Microorganisms can be prokaryotic—the bacteria or eukaryotic—the algae‚ protozoa or fungi. While viruses are acellular they are also studied in the scope of microbiology because
Premium Bacteria Ecosystem Organism
The cell is the basic functioning unit of organisms in which chemical reactions take place. These reactions involve an energy release needed to support life and build structures. The cell consists of membrane bound organelles‚ which are responsible for the division of labour. There are two main classes of cells- Prokaryotes which are cells without a nucleus‚ where the DNA is spread around the cytoplasm of the cell‚ an example of a prokaryote is a bacterium (See Figure 1). The other class is the Eukaryotes
Premium Eukaryote Organism Cell
The distinction between prokaryotes and eukaryotes is considered to be the most important distinction among groups of organisms. Eukaryotic cells contain membrane-bound organelles‚ such as the nucleus‚ while prokaryotic cells do not. Differences in cellular structure of prokaryotes and eukaryotes include the presence of mitochondria and chloroplasts‚ the cell wall‚ and the structure of chromosomal DNA. Prokaryotes were the only form of life on Earth for millions of years until more complicated
Premium DNA Organism Bacteria
Family | Campylobacteraceae | Genera | Helicobacter | Genus/Species | Helicobacter pylori | Description | Helicobacter pylori is a motile‚ curved‚ spiral‚ or straight‚ slightly plump‚ gram-negative rod. It is believed to be a major cause of gastritis and peptic ulcers although it resides solely on the gastric mucosa and does not enter cells. Microscopic description for the family Campylocbacteraceae | Shape: Spiral ShapedStaining Reaction (Gram): NegativeUnique Characteristic: Spiral
Premium Stomach Helicobacter pylori Peptic ulcer