Diatoms: Unicellular Organisms

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This is a view through a microscope. You're looking at an area that's about two millimeters in diameter. Within it you can see several species of marine diatom. Diatoms are unicellular organisms that live in a shell made of glass. It's called a frustule. They build their frustules themselves using silica collected from their environment. A solid glass shell can be a good thing when you're at the bottom of the food chain. They're photosynthetic, meaning they live by harvesting energy from sunlight. Diatoms come in two forms: pennate, and centric. You can see both in this image. Over on the left are three centric diatoms, their frustules are decorated with spiky protrusions at each end. Towards the bottom right there is another centric diatom,

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Diatoms Research Paper

Diatoms are microscopic and unicellular photosynthetic eukaryotic organisms, was first formally described in scientific literature by Danish biologist Otto Friedrich Müller in 1783. Diatoms can be either planktonic (free-floating) or benthic (attached to a substratum) and are non-motile in nature (Harper and Knoll, 1975). They represent as the major diverse phytoplankton in modern-day aquatic (marine and freshwater) ecosystem and contribute 20-25% of the oxygen production and carbon fixation in the…

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protest outline Essay

mitochondria. b. Cyanobacteria became chloroplasts after being taken up by eukaryotic cells. c. Giardia lamblia has two nuclei but no mitochondria, suggesting that a nucleated cell preceded the acquisition of mitochondria. 2. Although many protists are unicellular, they are highly complex. a. Amoeboids and ciliates possess unique organelles, such as contractile vacuoles. 3. Most protists are free-living; some are parasitic, some (e.g., slime molds) are saprophytic (feed on decaying plant material), and…

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make more plants. What a cell? It is the basic unit of life that makes up all living things. Cells produce other cells, and therefore they are organisms. Cells are the basic building blocks of organisms. They perform all life processes within the cell. The complex organisms are organized into tissues, organs, and organ systems. Complex organisms are organized as follows: Groups of similar cells work together and form tissues Tissues make up organs Organs make up organ systems, such as…

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Living organism may be made up of one cell: i.e. unicellular Living organisms, made up of numerous cells: i.e. multicelluar All cells have similar structures and chemicals Cell membrane: controls what goes in and out of a cell. Made up of biphosphorus fatty layer with proteins Cytoplasm: Jelly interior, similar to seawater Nucleus: Control Centre of cell. Made up of nucleic acid and compounds such as RNA and DNA Classification of Living Organisms All living organisms can be placed…

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Questions On Biology

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Essay about Ap Bio Outline

harsh conditions E. Prokaryotes obtain nourishment in a variety of ways - Prokaryotes can be either phototrophs (receive energy from light) or chemotrophs (receive energy from stored in organic or chemical compounds - Autotrophs – organisms that make their own organic compounds from inorganic sources -Heterotrphs – Most prokaryotes, animals, and fungi that obtain their carbon atoms from other organic compounds - Photoautotrophs – such as Cyanobacteria that use sunlight for…

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Yowhats Poppn Essay

about chromists, plants, fungi (54) III) Germination, morphology, Anatomy of Plants (24) • images IV) Bonus (4) • on reserve in the library . . Know scientific and common names, but the chart will have both . Chromista • unicellular, filamentous, colonial, coenocytic, or multicellular • cell wall composed of cellulose (not a protein) • often have alginic acid and sulfated mucopolysaccarides (So they don’t dry out)*** • pigments include chlorophyl, carotenes, and fucoxanthin…

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Microbiology: Bacteria and Bacteria Recycle Carbon Essay examples

Microorganisms are organisms that are too small to be seen with the unaided eye Germ refers to a rapidly growing cell Microorganisms include: Bacteria, archea, protozoa, fungi, actinomycetes, algae, viruses Atom – Molecule – Cell – Tissue – Organ – Organ System – Organism – Polpulation – Community – Ecosystem – Biosphere Autotrophs – Herbivores – Carnivores – Top Carnivores Microorganisms beneficial roles: - Marine and freshwater microorganisms are at the base of food chains…

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Science is a process of discovery about the natural world. It must be testable, requires evidence and doesn’t make moral or aesthetic judgments. Science is not provable Biology is the study of life Language of Science- Observation: Facts: Hypothesis: Proposed explanations for a narrow set of observations based on prior background information Theory: Powerful explanations for a broad range of observations, strongly supported by many different lines of evidence Ex: Evolutionary Theory, Gravitational…

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