首页
登录
职称英语
Since there is such an abundance of food in the sea, it is understandable th
Since there is such an abundance of food in the sea, it is understandable th
游客
2025-04-20
16
管理
问题
Since there is such an abundance of food in the sea, it is understandable that some of the efficient, highly adaptable, warm-blooded mammals that evolved on land should have returned to the sea. Those that did do that have flourished. Within about 50 million years—no time at all, geologically speaking —one of the four kinds of mammals that has returned to a marine environment has developed into the largest of all animal forms, the whale. A second kind, the seal, has produced what is probably the greatest population of large carnivorous mammals on Earth. This suggests that these "top dogs" of the ocean are prospering and multiplying. However, such has not been the case, at least not for the last 150 years. Trouble has closed in on these mammals in the form of equally warm-blooded and even more efficient and adaptable predators, humans. At sea, as on land, humans have now positioned themselves on top of the whole great pyramid of life, and they have caused serious problems for the mammals of the sea.
There is a simple reason for this. Marine mammals have the misfortune to be swimming aggregates of commodities that humans want: fur, oil, and meat. Even so, they might not be so vulnerable to human depredation if they did not, like humans, reproduce so slowly. Every year humans take more than 50 million tons of fish from the oceans without critically depleting the population of any species. But the slow-breeding mammals of the sea have been all but wiped out by humans seeking to satisfy their wants and whims. [br] What advantage did some land mammals gain by returning to the sea?
选项
A、Fewer predators exist in the sea.
B、More space is available in the sea.
C、There is a greater supply of food in the sea.
D、The climate is more hospitable in the sea.
答案
C
解析
根据文章第一段第一句“Since there is such an abundance of food in the sea,it is understandable that some of the efficient,highly adaptable,warm-blooded mammals that evolved on land should have returned to thesea.”可知,既然海洋中的食物如此丰富,一些在陆地进化生活的高效率、适应性强的热血动物其实就应该返回到海洋去。所以,陆地哺乳动物如果返回到海洋的话,可以得到更多的食物。据此判断,答案是C。
转载请注明原文地址:https://tihaiku.com/zcyy/4045486.html
相关试题推荐
Mystudentsfoundthebook______;itprovidedthemwithanabundanceofin-for
Sincethereissuchanabundanceoffoodinthesea,itisunderstandableth
Sincethereissuchanabundanceoffoodinthesea,itisunderstandableth
Mystudentsfoundthebook______,itprovidedthemwithanabundanceofinformat
Nowadaysthescatteringofgalaxiesandtheastoundingabundanceofstarsar
Nowadaysthescatteringofgalaxiesandtheastoundingabundanceofstarsar
Nowadaysthescatteringofgalaxiesandtheastoundingabundanceofstarsar
Nowadaysthescatteringofgalaxiesandtheastoundingabundanceofstarsar
Nowadaysthescatteringofgalaxiesandtheastoundingabundanceofstarsar
Nowadaysthescatteringofgalaxiesandtheastoundingabundanceofstarsar
随机试题
SinceAmericanidolstarTarynSouthernstartedcomposingmusicwithAIin2
Forthispart,youareallowed30minutestowriteacompositiononthetopicAd
Whatworriedmemostwas______tovisittheGreatWallwithmyparents.A、mynota
“一文钱的不义之财就可以让人的肌体与灵魂一寸一寸地产生病变,直至腐败。”这句人生
硫酸镁注射过量中毒时的特异性拮抗药是A:肾上腺素 B:尼可刹米 C:地高辛
一个人骑车去工厂上班。他从家出发,用30分钟骑行一半的路程后,他加快了速度,以每
当前,一些城市____于表面繁荣、豪华的发展模式,____对百姓的服务功能;一些
服从正态分布的质量特性可使用的控制图是()。
在《心理咨询师国家职业标准》(2005年版)中,心理咨询师的职业守则包括()。A
某施工企业2009年7月1日同某建设单位签订建造一栋高层住宅楼合同,工期为20个
最新回复
(
0
)