An overview of plant cell walls
By: Michael Gotama
The cell wall is the organelle that distinguishes the animal cell and plant cell, because those cell walls only locate at plant cell. Cell wall consist of cellulose embedded in a matrix of polysaccharides and proteins, it 10 - 100 times more thicker than plasma...
Why do plants usually have green leaves?
By: Sammy Stein
Plants usually have green leaves due to the presence of the pigment, chlorophyll. They appear green because this pigment has the unique ability to absorb all the colors in the spectrum, apart from green light, which it reflects (and we see). Light containes many wavelengths...
Microbial control: How to kill bacteria and other microbes
By: Tami Port MS
Heat, UV radiation, antibiotics and chemicals are all used to control bacteria, viruses and other microorganisms. How to they kill pathogens without hurting our cells? * How Control Agents Damage Microbes * There are many different methods used to control the growth of microorganisms. However...
Understanding mitosis and meiosis
By: Michael Gotama
On multicellular eukaryotes there are two types of cell division, mitotic (consist of mitosis and cytokinesis) and meiosis, the major use of mitosis is for division at autonomous cell, meiosis is for division at reproduction cell. The differences between mitosis and meiosis are: a. Mitosis...
Choanoflagellates: Missing link between unicellular and multcellular organisms
By: Tami Port MS
New research provides more evidence that ancestors of modern choanoflagellates may be the evolutionary bridge linking single-celled and multi-celled organisms. Choanoflagellares are single-celled eukaryotic cells classified as protozoans; tiny organisms that more closely resemble animals than plants. These tiny organisms are also very flexible in...
Differential bacterial growth media: MacConkey's, mannitol salt and blood agar
By: Tami Port MS
In microbiology, there are many different techniques used to identify microbes. Differential media typically provide general information regarding identity.* Bacterial Identification * Tools like differential media and stains help microbiologists to narrow down the microbial suspects, but don't necessarily provide the specific identity of...
How bats navigate in the dark
By: James Johnson
Bat is a generic term that refers to mammals that fly under their own power using wings. This separates them out from "flying" squirrels and sugar gliders. While there are just 43 species of gliders, there are over 1000+ species of bats. Most people never...
Osmosis and cell membranes
By: Michael Gotama
Osmosis can't be explained separate from membrane cell because osmosis is the diffusion of water across membrane. Although osmosis is kind of diffusion but there are a big differences between diffusion and osmosis. For a short diffusion is particle moving across the membrane from high...
Bacterial glycocalyx: Slime layers and capsules
By: Tami Port MS
From the cell wall inward, most bacteria are much alike. The bacterial cell wall and materials adhering to its surface are the main ways in which we differentiate one species or strain from another. Some bacteria have an additional layer outside of the cell wall...
Mannitol salt (MSA) bacterial growth medium
By: Tami Port MS
When bacterial cultures are grown in a laboratory environment, they are essentially captives, part of a microbial zoo dependent on people to provide the proper environment for their survival and growth. A nutrient-rich media is required to grow bacteria in the lab. Mannitol Salt Agar...

 

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