News tagged with separate sexes
Two from one: new research maps out evolution of genders from hermaphroditic ancestors
Biology /
Nov 20, 2008 |
4.9 / 5 (11) |
1
Research from the University of Pittsburgh published in the Nov. 20 edition of Heredity could finally provide evidence of the first stages of the evolution of separate sexes, a theory that holds that males and females develo ...
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Why Don’t More Animals Change Their Sex
Biology /
Feb 02, 2009 |
5 / 5 (3) |
3
(PhysOrg.com) -- Most animals, like humans, have separate sexes — they are born, live out their lives and reproduce as one sex or the other. However, some animals live as one sex in part of their lifetime and then switch ...
Fungi can tell us about the origin of sex chromosomes
Biology /
Mar 17, 2008 |
4.3 / 5 (3) |
0
Fungi do not have sexes, just so-called mating types. A new study being published today in the prestigious journal PLoS shows that there are great similarities between the parts of DNA that determine the sex of plants and an ...
In the war between the sexes, the one with the closest fungal relationship wins
Nov 10, 2009 |
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The war between the sexes has been fought on many fronts throughout time -- from humans to birds to insects, the animal kingdom is replete with species involved in their own skirmishes. A recent study by Dr. Sarah Eppley ...
Species thrive when sexual dimorphism broadens their niches
Biology /
May 09, 2007 |
5 / 5 (1) |
0
Some Caribbean lizards' strong sexual dimorphism allows them to colonize much larger niches and habitats than they might otherwise occupy, allowing males and females to avoid competing with each other for resources and setting ...
Despite 'peacenik' reputation, bonobos hunt and eat other primates too
Biology /
Oct 13, 2008 |
4.7 / 5 (6) |
2
Unlike the male-dominated societies of their chimpanzee relatives, bonobo society—in which females enjoy a higher social status than males—has a "make-love-not-war" kind of image. While chimpanzee males frequently band together ...
Ohio wife, husband both battling breast cancer
Oct 12, 2009 |
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(AP) -- A husband and wife are both undergoing treatment for breast cancer in a case that illustrates how the disease can strike both sexes. Mike and Barbara Welsh, of Monroe, in southwestern Ohio, each had surgery this ...
Evolution of the Sexes: What a Fungus Can Tell Us
Biology /
Jan 09, 2008 |
4.1 / 5 (11) |
0
Fungi don't exactly come in boy and girl varieties, but they do have sex differences. In fact, a new finding from Duke University Medical Center shows that some of the earliest evolved forms of fungus contain clues to how ...
Why Do Males and Females Frequently Differ in Body Size and Structure?
Biology /
Oct 08, 2007 |
4.4 / 5 (7) |
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As even the most casual observer of nature knows, males and females frequently differ in body size, form and structure. But how these differences have developed – a topic studied for decades by evolutionary biologists – is ...
Male sabertoothed cats were pussycats compared to macho lions
Nov 05, 2009 |
4.2 / 5 (6) |
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Despite their fearsome fangs, male sabertoothed cats may have been less aggressive than many of their feline cousins, says a new study of male-female size differences in extinct big cats.
Ready when you are: First evidence that visual cues affect timing of sexual maturation
Biology /
Feb 14, 2007 |
4.2 / 5 (11) |
0
Scientists from the Universities of Exeter and Glasgow today reveal how some females become sexually mature more quickly if they see attractive males. Research published today in the Royal Society journal Biology Le ...
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