Conversations about and representations of all the different people who experience periods; women, trans men, and non-binary people, have been broadening and this includes intersex people too. It isn’t just cisgender women who have periods – and worth noting too – that many cisgender women ...
Horns are structurally different from antlers and are permanent (they do not fall off and regrow like antlers). In antelope, cattle, goats, sheep and other members of the family Bovidae, males have horns, and in many species females also have horns. Horns consist of a bony core covered by...
A female dog in heat will typically urinate more frequently or may start to develop marking behaviour. This is because during the estrus cycle, the urine contains hormones that signal the dog’s reproductive state so that potential males can find her and engage in reproduction. This smell can ...
As the two-spot ladybird has overlapping generations, theory predicts that the most effective strategy for both sexes is to have similar sexual maturation periods. The results of this study support this prediction. The actual lengths of the maturation periods, however, will depend largely on the ...
The limbs of horse legs have special tendons and ligaments to allow them to stand with almost no muscular effort, letting them stand for long stretches of time during periods of drowsiness. But contrary to popular belief, a full, deep sleep can't occur for a horse unless it islying down ...
This strategic increase in mating effort could result in higher male reproductive success because mating attempts towards receptive females are likely to be less costly and males could have a greater probability of fertilisation. 展开 关键词: Sexual selection Male mate choice Mating strategies Female ...
But we do have some common DNA. HowStuffWorks During party conversation, at a trivia night or even in a "Dude Perfect" video, you may have heard the fun little factoid that humans and bananas share 50 (or 60) percent of the same DNA. Huh? There seems to be a ton of difference ...
Instead, they go through dormancy periods that allow the plant to relax and recharge for the next blooming session [source: Just Add Ice Orchids]. If you can't find the right orchid type and have some extra cash lying around, you can always pay to propagate or clone a rare orchid ...
The complicated behaviours crows display, likehoarding foodfor later meals, may have evolved because it helps them survive. Studies also show that, like primates,crows have an impressive working memory, which allows them to remember and use information over short periods. ...
SapajusnigritussexualsignalsvocalcommunicationFemales across a range of animal taxa produce vocalizations and signals uniquely associated with periods of mating. While such signals may ultimately function to increase female attractivity to males, conflicting findings challenge the extent to which these signals...