Why do some animals change their color during breeding season? A. To look beautiful. B. To hide from enemies. C. To show they are angry. D. To make friends. 相关知识点: 试题来源: 解析 B。这道题考查动物繁殖期习性变化原因。选项 A“To look beautiful.”(看起来漂亮),通常不是主要原因...
This is a female of breeding age. She is regulating her body temperature by entering the water, and gaping her mouth to the wind. There are many blood vessels in the roof of the mouth and this cools the blood going to her brain. There is some concern in Queensland that climate change ...
Dog breeding is straightforward. Mate a male dog, a.k.a. Sire or stud with a female dog a.k.a. dam or bitch, so they can birth a litter of pups for sale. Do this repeatedly, and you have yourself a dog breeding business. However, like most industries where animals are a commodity...
The Monkey, who is themost imitative of animals, descended from the treetop andendeavored to do as they had done. Having handled the net, hethrew it into the river, but became tangled in the meshes anddrowned. With his last breath he said to himself, "I am rightlyserved; for what ...
On account of our good eyesight, humans are said to be a visual species. However, when you stop and think about it, human language (at least English) has a surprisingly large vocabulary for the squawks, grunts, chirps, honks, growls, etc. that other animals make. What, if anything, ar...
Emmanuel Ocbazghi
In addition to black bears, the refuge is home to many other charismatic animals such as the endangered red wolf and the American alligator. The red wolf is one of the rarest endangered species in the world. Alligator River NWR lies within a 5-county area that is home to the only wild ...
” Mr. Lawler writes. Thanks to intensive breeding that emphasizes the production of high-profit breast meat, today’s chickens grow so fast that their heavy breasts strain their skeletons—the bird’s bones evolved to carry a far slenderer torso. There is also strong evidence that they live...
There are several reasons why India is a poor country. Some have historical roots and others derive strength from socio-political structures. Lack of effective governance and corruption has only sustained Indian poverty.
As soon as humans started inviting animals into their homes (or caves, to be more historically accurate), something pretty cool happened. Through the magic of selective breeding, we started favoring the critters that were a bit more into us — the ones that didn’t mind a pat, cuddle, or...