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...
Clones are superior breeding animals used to producehealthier offspring. Animal cloning offers great benefits to consumers, farmers, and endangered species: Cloning allows farmers and ranchers to accelerate the reproduction of their most productive livestock in order to better produce safe and healthy foo...
This essay began as a response to it because I wanted to follow up on the last comment she received arguing there should be no more breeding pets because there are so many companion animals who need homes right now. I totally agree, and I encourage readers to read or reread Dr. Pi...
Choose an ethical elephant sanctuary like Elephant Nature Park, with responsible ways to view and interact with the animals. The elephants at Elephant Nature Park come mostly from abusive pasts, including being overworked in trekking camps, forced breeding and street begging. It leaves them with pe...
For a vegan, breeding chickens for eggs is ethically akin to breeding humans in order to harvest their fingernails. Sure, we don't really need our fingernails, but we can agree breeding a person just for their fingernails would be exceptionally lame — almost as lame as the conditions would...
” wrote the Swiss biologist inWild Animals in Captivity, a compilation of what he learned as director of the Basel Zoological Gardens, in 1942. “When breeding does not occur, something is wrong with the methods of keeping the animals; if breeding does occur, it is a guarantee that the ...
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Emmanuel Ocbazghi
Among the apparent differences are the variations in the color of the animals’ noses, ears, and lips. Have you ever noticed that your cat has pure black lips and wondered why? Again, selective breeding is at work, with official standards for each one.However, cats with black lips can tra...
Do zoos hurt animals? Yes, zoos harm animals in a wide variety of ways. Wild animals are killed and kidnapped to supply zoos. For starters, animals are not naturally found in zoos. ... Once a species is brought into a zoo, zoos often use captive breeding programs to produce younger ani...