Listen to part of a lecture from a biology class.
听力材料
Listen to part of a lecture from a biology class.
So, just like people, animals need sleep. And you may think of sleep mainly as a time for the body and the brain to rest and repair themselves. But according to scientists, there are also some other practical benefits of sleep for animals in the wild, specifically related to the timing of when their sleep occurs. Over time, some animals may have evolved and developed an instinct to sleep at a safer time of day, which helps them survive. First of all, many animals sleep at certain times because those are the times it is more difficult for them to find food. This allows them to avoid wasting energy looking for food when it would be difficult to find it. Finding food requires energy because animals have to forage for it, which is, of course, more difficult to do when they can't see well, like at night. For example, for gorillas to find their food, they need to climb trees and search for fruits and leaves, which is hard to do when they can't see that well. So they avoid wasting energy by sleeping at night and looking for food in the daylight when it's easier to find. Another benefit is that sleeping at certain times of the day could help protect animals from predators. How? Well, an animal can sometimes avoid predators by being asleep and inactive at times of the day when its predators are awake and active. A sleeping animal is often less noticeable to predators because it's not moving around, doing things out in the open. So, back to the gorillas. A predator of gorillas is the leopard. And leopards hunt at night. So, because gorillas sleep at night in the nests they build in the trees, they are less visible to the leopards roaming around trying to find them.
问题
Using points and examples from the lecture, explain two benefits for animals of sleeping at certain times of day.
我的笔记 编辑笔记
-
分数最高最新
-
考场极速版：
In the biology lecture, the professor explained that animals may have evolved an instinct to sleep at safer times of day, which helps them survive.
Specifically, there are two key benefits of sleep timing for wild animals.
First, the professor used gorillas as an example. Since they need to climb trees to search for fruits and leaves, they sleep at night and forage during daylight to avoid wasting energy when visibility is poor.
Second, again using gorillas as an example, sleeping at night protects them from predators like leopards that hunt nocturnally.
By sleeping in their nests at night, gorillas remain less visible to leopards.
复盘进阶版：
The professor explains two survival benefits for animals sleeping at specific times.
First, it conserves energy when food is scarce. For example, gorillas sleep at night because finding fruits and leaves requires climbing trees—a difficult task in darkness. By sleeping when visibility is poor, they avoid wasting energy on unsuccessful foraging, reserving strength for daytime feeding.
Second, it reduces predator encounters. Gorillas' main predator, leopards, hunt nocturnally. By sleeping in tree nests at night, gorillas remain motionless and hidden, making them less detectable to prowling leopards.
These adaptations—energy efficiency and predator avoidance—demonstrate how sleep timing directly enhances survival in the wild. -
-
会员福利内容准备中，丰富答题思路即将上线
题目讨论
如果对题目有疑问，欢迎来提出你的问题，热心的小伙伴会帮你解答。