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Sex characteristics

sex characteristics

Those characteristics that distinguish one sex from the other. The primary sex characteristics are the ovaries and testes and their related hormones. Secondary sex characteristics are those which are masculine or feminine but not directly related to reproduction.


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Re: The most boring tasks in Biology

Counting cyanobacteria using a hemocytometer on a fluorescent microscope was boring. I was measuring the change in photosynthetic characteristics after changes in illumination at different iron concentrations. This involved lots of time points where I needed the cell density in the culture, ...

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by jonmoulton
Fri Aug 15, 2014 3:32 pm
 
Forum: General Discussion
Topic: The most boring tasks in Biology
Replies: 1
Views: 916

Why similar features are preserved in a gigantic population?

I've noticed that East Asians, Chinese, Koreans, Mongolians and Japanese (except the native Ainu) resemble each other. All have common characteristics as epicanthic fold, oblique eyes, slightly marked brow ridges, flat face, high orbits, etc. .. The teeth are Characterized by sinodonty. But ...

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by Goldentiger
Mon Jul 14, 2014 1:22 am
 
Forum: Human Biology
Topic: Why similar features are preserved in a gigantic population?
Replies: 2
Views: 820

Gender divison in two opposites is greatest mistake of manki

... you have observed in old people is simply the result of the loss of the sexual hormones. People are not turning into the opposite sex. They are simply ... they no longer have the hormones that produce the secondary sexual characteristics. If you look at prepubescent children you will see the same ...

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by animartco
Sun Jul 06, 2014 2:48 pm
 
Forum: Evolution
Topic: Gender divison in two opposites is greatest mistake of manki
Replies: 26
Views: 19660

Re: Irrefutable Facts Against Evolution

... written about these "religious" leaders, they are believed in and followed by millions. 7. The Messiah would have had 456 identifying characteristics. Jesus had them all. 8.Professor Emeritus of Science at Westmont College, Peter Stoner, has calculated the probability of one man fulfilling ...

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by Meranda
Sat Feb 22, 2014 10:43 pm
 
Forum: Evolution
Topic: Irrefutable Facts Against Evolution
Replies: 52
Views: 59225

How does DNA cladistics work???

... creatures dependent upon evolutionary family as controlled by bunching taxa consistent with "inferred characters," that is qualities or characteristics imparted particularly by the taxa and their regular precursor.

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by pioneer07
Tue Feb 04, 2014 9:47 pm
 
Forum: Zoology Discussion
Topic: How does DNA cladistics work???
Replies: 2
Views: 2153
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