Nicole King, a biologist at the University of Wisconsin at Madison in Wisconsin, has found that a number of adhesion and signaling molecules, including tyrosine kinases and two cadherins, were key molecules for animal developme...
Animals use adhesion molecules called cadherins and a variety of signalling molecules such as tyrosine kinases. But did these molecules originate from the dawn of multicellular animals, or did the first primitive animals simply co-opt molecules that were already around? 展开 年份: 2003 ...
So, when we see our pets or other animals enjoying a good scratch or cuddle, it’s not just a cute quirk. It’s a throwback to their ancestors, who figured out early on that sticking together (quite literally) was the way to go. The love for a good stroke or snuggle has been pass...
It is a story about animals that get together to find water. Along their journey, lots of funny things happen, and of course, they have a lot of adventures.The animals in the grasslands in Africa are waiting for the coming flood. However, this year's flood seems to come later than in...
In nature, monogamous pairing refers to mating systems where a pair of animals stick together to raise their offspring. That “family” structure is actually the main feature of the monogamy. This isn’t quite the same thing as sexual monogamy, though the two usually go hand in hand. ...
cling. Animals in the rainforest often carry seeds that cling to their fur or feathers, helping to disperse the seeds to new locations. The sentence describes how seeds stick to the fur or feathers of animals. Of the choices given: * cling means to hold on tightly. * cohere means to ...
As with most phenomena in the natural world, there are reasons why dolphins group together in pods. Hunting Dolphins are carnivores that hunt a variety of aquatic animals. Most of their diet is comprised offish, but they will also predatesquid,jellyfish, andcrustaceans. Dolphins may even feed ...
During the dry season, these herds include both males and females working together to find food. When the wet season begins, the herd separates into a male herd and a female herd. These new groups graze on the plentiful grasses and other vegetation. EvolutionScientists believe that the ...
One animal that really does seem to stick to the “til death do us part” aspect of mating for life is the coyote. Studies have shown that these canids do not seem to “divorce” at all, only finding a new mate when their partner dies. They also put a lot of effort into maintaini...
any more friends, so they planned to go back to be together. They 8 the fact that in order to stay warm, they need to live with the pain caused by the close relationship ( 关系 ) with friends. Only in this way were they able to spend the cold winter 9 . Understanding and ...