Why don’t these scientists catch animals and study them in zoos? The 27 is in the word “behavior”. Animals behavior scientists want to learn 28 animal behave in their wild homes. When animals live in cages (笼子) or in zoos, they do not act the same as they do when they are 29...
2. What does the man ask the woman to do? A. Take him to hospital. B. Go to a class with him. C. Submit a report for him. 3. Who will look after the children? A. Jennifer. B. Suzy. C. Marie. 4. What are the speakers going to do? A. Drive home. B. Go shopping. C....
Why do humans laugh That question increasingly【1】 (interest) scientists around the globe. People of all ages and cultures laugh spontaneously(不由自主地), and they spend quite a bit of time 【2】 (do) it. Laughter is a feature that we share【3】 other great apes such as the ...
【题文】 Scientists have solved the mystery of why the overwhelming majority of mammoth fossils(化石) are male. Much like wild elephants today, young male Ice Age mammoths probably travelled around alone and more often got themselves into risky situations where they were swept into rivers, or fe...
. How scientists can help wild animals. . What scientists plan to do next. 相关知识点: 试题来源: 解析 1. 所有野生棕色大熊猫的照片都是在秦岭拍摄的。 2. 七仔体内缺少一小部分名为Bace2的DNA。 3. 对黑白大熊猫进行进一步研究的目的是将棕色大熊猫的DNA与它们的DNA进行比较。 4. 最后一段主要...
Some scientists believe that birds do sing some of the time just because they are happy. However they sing most of the time for a very different reason. Their singing is actually a warning to other birds to stay out of their territory.Do you know what a territory is A territory is an ...
Studying fin scrapes in a closed group of orcas shows that postmenopausal mothers put energy into helping their sons, but not daughters or grandchildren.
Scientists aren't sure why this happens. Benson says that it's pretty common for ovarian disease to cause dysfunction of the ovaries, yet spontaneous sex reversal is much less common. "You couldn't simply remove an ovary from a hen and generate a spontaneous sex reversal," he says. "In ...
Another explanation may have something to do with the way dogs fine-tune to the sounds they hear. A dog's sense of hearing is twice as sensitive as that of a person's, though acuity can vary depending on breed and age. Scientists have not come to one single conclusion about why dogs ...
parasitologists like Kinsella are sometimes the only expert on a specific group. When these scientists die, their intricate understanding of how to classify and connect species goes with them. “When I’m gone, I don’t know if there’s anybody left that can do what I do,”...