Questions on the classification of biological organisms, and the methods used for classifying them.

learn more… | top users | synonyms

1
vote
1answer
284 views

How many (taxonomic) families are there?

Approximately, how many families have been identified? I've often often come across figures for the total number of species on Earth. Recently, I found myself wondering about the encompassing ranks ...
1
vote
0answers
17 views

What is difference between breed, variant, subspecies and species?

What is the difference between breed, variant, sub-species and species? Are there any similarities between sub-species and sub-population of a region?
1
vote
0answers
28 views

Endemic plant families on islands?

Endemism on islands is quite a common phenomenon, at least at the level of species or genera. Old continental fragments like Madagascar or New Caledonia may even harbour endemic families which went ...
1
vote
0answers
38 views

Regarding the kingdom Animalia, which phylogenic tree is more common: Molecular Comparisons or Body-Plan Grades

In the picture below, which I obviously do not own: it depicts two different phylogenic trees, one which is based on molecular comparisons and another one which is based on body-plan grades. My ...
1
vote
0answers
32 views

Is there a classification of species based on number of different cell types? [closed]

The human body has around 200 different types of cells, according to my brief internet research. How does that compare to other species? Is there a classification of species based on that, i.e. number ...
0
votes
1answer
30 views

Information and image of Genus Acesina

I am searching for image and information, like distribution etc of the genus Acesina. The Taxonomic tree is: ...
0
votes
0answers
7 views

What are the main principles of the Bacteriological Code?

Although the Bacteriological Code is an important guideline for taxonomists and microbiologists, describing the criteria for delineating species and higher taxa of the prokaryotes, I, and plenty of ...
-2
votes
1answer
37 views

What is the smallest known organism with a skeleton? [closed]

See question title. After doing some looking around on my own I haven't found much so I figured I'd ask some experts.
-3
votes
1answer
448 views

Which plants live for more than one year and less than two years? [closed]

What kinds of plants live for more than one year and less than two years? Are there any categorical or taxonomical names for such plants?