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When prehistoric man arrived in new parts of the world, something strange happened to the large animals: they suddenly became extinct. Smaller species survived. The large, slow-growing animals were easy game, and were quickly hunted to extinction. Now something similar could be happening in the oceans. That the seas are being overfished has been known for years. What researchers such as Ransom Myers and Boris Worm have shown is just how fast things are changing. They have looked at half a century of data from fisheries around the world. Their methods do not attempt to estimate the actual biomass (the amount of living biological matter) of fish species in particular parts of the ocean, but rather changes in that biomass over time. According to their latest paper published in Nature, the biomass of large predators (animals that kill and eat other anima A. (A) large animals were vulnerable to the changing environment B. (B) small species survived as large animals disappeared C. (C) large sea animals may face the same threat today D. (D) slow-growing fish outlive fast-growing ones 查看答案 更多"When prehistoric man arrived in new"的相关试题: [单项选择] When prehistoric man arrived in new parts of the world, something strange happened to the large animals: they suddenly became extinct. Smaller species survived. The large, slow-growing animals were easy game, and were quickly hunted to extinction. Now something similar could be happening in the oceans. That the seas are being overfished has been known for years. What researchers such as Ransom Myers and Boris Worm have shown is just how fast things are changing. They have looked at half a century of data from fisheries around the world. Their methods do not attempt to estimate the actual biomass (the amount of living biological matter) of fish species in particular parts of the ocean, but rather changes in that biomass over time. According to their latest paper published in Nature, the biomass of large predators (animals that kill and eat other anima A. (A) the stock of large predators in some old fisheries has reduced by 90% B. (B) there are only half as many fisheries as there were 15 years ago C. (C) the catch sizes in new fisheries are only 20% of the original amount D. (D) the number of larger predators dropped faster in new fisheries than in the old 查看答案 [单项选择]When prehistoric man arrived in new parts of the world, something strange happened to the large animals. They suddenly became extinct. Smaller species survived. The large, slow growing animals were easy game, and were quickly hunted to extinction. Now something similar could be happening in the oceans. That the seas are being overfished has been known for years. What researchers such as Ransom Myers and Boris Worm have shown is just how fast things are changing. They have looked at half a century of data from fisheries around the world. Their methods do not attempt to estimate the actual biomass (the amount of living biological matter) of fish species in particular parts of the ocean, but rather changes in that biomass over time. According to their latest paper published in Nature, the biomass of large predators (animals that kill and eat other animals) in a new fishery is reduced on average by 80% within 15 years of the start of exploitation. In some long fished areas, it has h A. large animals were vulnerable to the changing environment B. small species survived as large animals disappeared C. large sea animals may face the same threat today D. slow growing fish outlive fast growing ones 查看答案 [单项选择]When was the man in New York A. About two years ago. B. About one year ago, C. About three years ago. 查看答案 [单项选择]When is the man’s new appointment A. Monday morning B. 4:00 this afternoon C. Tomorrow at 9:00 a.m. D. 9:00 this evening 查看答案 [单项选择]When did the man move into the new flat A. Church Street, Randwick. B. Randwick Street, Church. C. Walter Street, Randwick. 查看答案 我来回答: 提交 最新试题 ●    [单选题]型动车组辅助变流器分为单辅助变流器和双辅助变流器 。 ●    [单选题]解读如下航行通告 (C0719/14 NOTAMN Q)ZGZU/QAPCH/IV/BO/ ●    关于网织红细胞计数，正确的描述是（）。 ●    [单选题]（）情况下车站不用在各出入口设置告示牌告知乘客。 ●    《建设工程质量管理条例》所称的建设工程是指( )等。 ●    [判断题]集中解送重要空白凭证时，调出方应坚持双人清点、装箱、加锁。（ ） 网站地图 我要搜题网  版权所有  ©2023  湘ICP备18016427号   购买搜题卡查看答案 [会员特权] 开通VIP， 查看 全部题目答案 [会员特权] 享免全部广告特权 推荐91天 ¥36.8 ￥80元 31天 ¥20.8 ￥40元 365天 ¥88.8 ￥188元 请选择支付方式 微信支付 支付宝支付 点击支付即表示同意并接受了《购买须知》 立即支付 系统将自动为您注册账号 已有账号登录 找回账号密码 请使用微信扫码支付 订单号： 请不要关闭本页面，支付完成后请点击【支付完成】按钮 支付完成 取消支付 恭喜您，购买搜题卡成功 系统为您生成的账号密码如下： 账号 密码 重要提示：请拍照或截图保存账号密码！ 我要搜题网官网：https://www.woyaosouti.com 我已记住账号密码