1. Describe the structure of a generalized eukaryotic plant cell. Indicate the ways in which a nonphotosynthetic prokaryotic cell would differ in structure from this generalized eukaryotic plant cell. Plants are unique among the eukaryotes. The interiors of plant cells‚ like all eukaryotic cells‚ contain numerous organelles‚ which are membrane bounded structures that close off compartments within which multiple biochemical processes can proceed simultaneously and independently. The cell membrane
Premium Eukaryote Cell Organelle
Origin of Life 1. The four stages of hypothesis for the origin of life on Earth by chemical evolution is * Abiotic synthesis of small organic molecules * The joining of small molecules into macromolecules * Packaging of these molecules into protobionts * The origin of self replicating molecules that made inheritance possible. 2. A.I. Oparin‚ and J.B.S. Haldane hypothesized a reducing environment. Stanley Miller and Harold Urey did lab experiments that showed that the abiotic
Premium Evolution DNA Snowball Earth
The studies of Robert Hooke 1665 into a plant material would allow the determination of a pore like regular structure surrounded by a wall of which he called cells’ this in itself unbeknownst to him‚ was the discovery of the fundamental unit of all living things. In 1838 a botanist called Schleiden derived the theory The basic unit of structure and function of all living organisms is the cell.’ Over 150 years later this can be regarded as one of the most familiar and important facts within the
Free Cell Eukaryote Organelle
classification that divides cellular life forms into archaea‚ bacteria‚ and eukaryote domains. It emphasizes the separation of prokaryotes into two groups‚ called Bacteria and Archaea. These two groups and eukaryotes each came from separate ancestors with poorly developed genetic make-ups. This classification system recognizes the fundamental divide between the two prokaryotic groups. Archaea appear to be more closely related to eukaryotes than they are to prokaryotic bacteria. The Archaea Domain consists
Premium Eukaryote Bacteria Archaea
rays from the sun. The sun’s rays made life outside of water nearly impossible. These changes made life on land possible and evolution occurred as prokaryotes gave rise to land living eukaryotes. The microfossil record indicates that the first eukaryotes evolved at least 1.5 billion years ago. Eukaryotes are distinguished from prokaryotes by their larger size‚ the separation of nucleus from cytoplasm by a nuclear envelope‚ the association of DNA with histone proteins and its organization
Premium Eukaryote Bacteria Cell
which can be distinguished on the basis of their structure and the complexity of their organization. The simplest organisms which consist of one cell are called prokaryotes. More complex organisms are called eukaryotes and they consist of many cells. Objectives: * Define the terms: Eukaryotes & Prokaryotes with examples * Explain the differences between Eukaryotic cells and Prokaryotic cells with particular reference to the characteristics of their: (Nucleus/nucleoid‚ DNA‚ Mitotic division
Free Cell Eukaryote Bacteria
diverse and widespread of prokaryotes Archaea – prokaryotes that live in Earth’s extreme environments Eukarya – multicellular organisms K. Plantae – consist of terrestrial multicellular eukaryotes that carry out photosynthesis K. Fungi - organisms that decompose for nutrition K. Animalia – multicellular eukaryotes that ingest other organisms 6. Describe the observations and inferences that lead Charles Darwin to his theory of evolution by natural selection Darwin had noticed many
Premium Life Scientific method Biology
All living things have evolved into three groups‚ or domains‚ of closely related organisms: Archaea‚ Bacteria‚ and Eukaryota. Archaea and Bacteria are small‚ simple cells surrounded by a membrane and a cell wall‚ with a circular strand of DNA containing their genes. They do not contain a nucleus or other internal structures that higher cells may have. These are called prokaryotes. Basically all the life you see today‚ including plants and animals‚ belongs to the third domain‚ Eukaryota. Eukaryotic
Premium Bacteria Eukaryote Cell
1. What are the major characteristics of each of the three domains of life? Why do some researchers believe that the Kingdom Protista should be split into more than one kingdom? In the early days of biology‚ all organisms were classified as either plants or animals. Single-celled eukaryotic organisms such as algae and Paramecium were assigned to one of the kingdoms according to whether they are photosynthetic or not. Fungi and prokaryotes were grouped with plants‚ because fungi are sedentary and
Premium Bacteria Eukaryote Organism
Keith Foy McDowell Bio 101 04/09/2012 Amoeba The amoeba falls under the classification Euklaryota. It is part of the Protista kingdom which is made up of the simplest known eukaryotes. These organisms are single celled with a membrane surrounding the nucleus. The amoeba genus has over 290 million species. The amoeba cell is described as riged with extending pseudopods located at the anterior side of the cell. The pseudopods are used to move the cell around. It also has extensions
Free Bacteria Cell Eukaryote