In the wild, it often comes down to predator and prey (捕食者与借物),the hunter and the hunted. Most animals want to stay 41 . They have developed ways of adapting to 42 habitats, and hiding or escaping from those who would like to 43 them. So how do they do that?
One very helpful adaptation is called camouflage (伪装You may have been 44 by an animal that was using camouflage in the past. It looked so similar to its surroundings that you nearly 45 seeing .it at all. Its coloring,markings, or other physical features resemble its 46 so much that you can look directly at it without 47 it at first. This is often good enough to fool a predator that is scanning an area to look for 48 . This helps prey to 49 from its predator. But did you know that it often works the other way around, too? Predators can use camouflage to 50 their prey. If a predator wants to eat a certain animal, and that animal cannot see it
lying in 51 , it can catch its prey 52 , swallowing it before it even knows what is happening.
Another popular adaptation is mimicry (拟态)• Mimicry is when an animal has markings or other 53 characteristics that allow it to look like some other kind of animal or plant. If it can make its predators 54 that it is something that preys on them, or would at least be difficult or 55 to catch, its predator will often go off in search of a(n) 56 target.
Sometimes animals are able to 57 when their habitat changes because they adapt to the new conditions. For example, birds that were accustomed to nesting in tall 58 have survived industrialization of their habitat by learning to nest in the narrow openings of tall buildings. Raccoons easily adapt to residential areas that have 59 their woodland homes. They often help themselves to any food they can get,such as food in trash cans, or 60 inside people’s homes