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0
votes
0answers
10 views

What type of bacterial colony is this?

I am having trouble identifying the microorganism in the picture. I think the shape is rhizobium and probably a bacillus, but I can't narrow it down from here. It was grown on agar plate with ...
0
votes
1answer
39 views

How to determine externally that a whale is a mammal?

Mammals have external qualifying characteristics like body hair, ear pinna, etc. But a whale has none of that. So, can it be identified as a mammal just by external observations?
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2answers
1k views

Why does the bunny have a white butt?

There are several species of plant eaters that have a very visible bright white behind: several kinds of deer, rabbits, antelopes, etc. Does this white spot have any function to it, or is it purely ...
2
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1answer
169 views

List of Asymmetric Animals

The (male) Fiddler Crab is a famous example of an animal whose morphology exhibits neither mirror nor radial symmetry: (Image source) List of animals featuring external asymmetry is a Wikipedia ...
4
votes
2answers
86 views

Are there special constants in biology that define organism's morphology?

In math, there are special numbers, like Pi (3.14159...) and e (2.71828...). In chemistry, there's numbers like avogadro's number (6.0221413e+23). For example a circle can be defined in terms of 2 * ...
17
votes
3answers
1k views

Do animals exist with an uneven total number of digits?

I recently finished reading Contact by Carl Sagan. In the book they talk about a pattern in the transcendental number like pi or e, and comment that it is found in base 10 or however many fingers the ...
6
votes
2answers
141 views

Can any species be bred selectively/engineered to become as diverse looking as dogs?

I've done some research and it appears that dogs are the most diverse looking single species of mammals. The questions that interest me is - are dogs special in respect to genes/gene activation ...