One prominent hypothesis is thatplay is beneficial to individuals because itallows them to practice skills neededlater in life.Feedstuffs
Overall, males had significantly longer bodies and tails than females. Females were significantly heavier and had larger heads than male snakes. Maternal ... MA Krause,GM Burghardt - 《Proceedings of the Zoological Society of London》 被引量: 17发表: 2007年 Sexual dimorphism of body and relative...
Over excitement can bring out mounting behaviors in any dog, females included. It’s not uncommon to see humping at the dog park or doggie daycare; places where there’s a good chance of dogs becoming over stimulated. When dogs get over excited their energy has to go somewhere. Some dogs...
"Male (particularly unaltered) dogs may also spend more time sniffing females for information about their reproductive status," Furlong told Live Science in an email. But how is it possible for dogs to glean all of this information from a simple butt sniff? One of the first clues for ...
Some people think history has nothing or little to tell us. Others believe that studying the past history can help us better understand the present. Discuss both views and give your own opinion. Give reasons for your answer and include any relevant examples from your own knowledge or experience...
In general, females are less ornamented than males and until recently female ornaments have been regarded as non-adaptive correlated effects of selection on males. This view is challenged and the alternative hypothesis that females' ornaments have evolved independently of male showiness, by intersexual...
aMale mosquitoes do not bite-its the females who have a taste for blood,which they need for their eggs . for a proud mosquito mother,not just any blood will do. 马累蚊子不叮咬它有口味为血液,他们为他们的蛋需要的女性。 为一个骄傲的蚊子母亲,不仅所有血液将做。[translate]...
Dogs were classified as aggressive if they growled often and/or had attempted to snap at or bite a human at least occasionally, the researchers explained. To cut to the chase, male dogs were more aggressive than females, and sterilization had no effect on aggression. ...
Capybaras are the largestrodentsin the world, and they can weigh up to 150 pounds or more. That’s bigger than many decent-sizeddogs! The average capybara is about two feet tall at the shoulder and four feet long from head to tail. Male capybaras are generally bigger than females. ...
aMale Asian elephants have smaller tusks,and the females often do not have tusks at all. Male Asian elephants have smaller tusks,and the females often do not have tusks at all.[translate]