Dictionary » D » Dichotomous



(taxonomy) a term that describes divided or dividing into two parts or classifications

(botany) describes the type of branching in plants that results when the growing point (apical bud) divides into two equal growing points, which in turn divide in a similar maner after a period of growth, and so on. Dichotomous branching is common in ferns and mosses.

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Gram Positive Cocci

... it mean that it ferments sucrose instead of lactose?) Nitrate Reduction: Negative (does not break down NO) Catalase: Positive Based on the first dichotomous key we had been using it led us to a bacteria called Gaffkya Tetragena, which I could not find any information on except for some very old ...

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by lucrezia03
Wed Oct 17, 2012 11:58 pm
Forum: Microbiology
Topic: Gram Positive Cocci
Replies: 2
Views: 5372

How to create a science project about acne?

... it would be really hard to test acne the way you are thinking. When you culture bacteria from skin, you have to use several, let's call them dichotomous keys, to determine what kind of bacteria you are looking at. Gram stain is the first step, but then cell shape, cluster patterns, etc all ...

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by tmbirkhead
Sun Sep 23, 2012 5:25 am
Forum: Human Biology
Topic: How to create a science project about acne?
Replies: 2
Views: 5425

Re: gram negative cocci. please help

Your professor should have given you a dichotomous key or some other type of table(s) to help you identify your bacteria. At the very least I would think a list of bacteria would be provided, because only the professor knows what bacteria the ...

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by mamasewbusy
Sun Sep 09, 2012 3:39 pm
Forum: Microbiology
Topic: gram negative cocci. please help
Replies: 8
Views: 10767

narrowed down 1 of my unknowns help with other...

... that they are given is not one that is a realistic representation of how any given species would be identified in the wild. It is more like a dichotomous key (not really if you look at hemolysis here :) ) carefully crafted to separate the different candidates from one another in a minimum ...

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by canalon
Tue Apr 24, 2012 10:42 am
Forum: Microbiology
Topic: narrowed down 1 of my unknowns help with other...
Replies: 11
Views: 4404

seeking opinion on an unknown

Hello, I am performing many biochemical tests for a morphological unknown. I am filling out the dichotomous key and would just like opinions as to if I am on the right track. Thanks! So far, I have: Gram Negative Rods Motility negative MR-VP positive Citrate positive Indole ...

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by sully325
Tue Dec 06, 2011 6:11 pm
Forum: Microbiology
Topic: seeking opinion on an unknown
Replies: 1
Views: 1403
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