TPO72阅读真题+题目+答案下载：Invading Algae

近期，ETS官方已经更新了TPO72，小编也是刚拿到TPO72，第一时间分享给广大的托福们，具体内容如下：

TPO72阅读真题+题目+答案下载：Invading Algae

Biological invasions by exotic species are an escalating threat to biodiversity around the globe. Invasive species can displace native ones and irrevocably alter ecosystems. Most imported species either die or have limited growth in their new home, but a small percentage of the newcomers are opportunists whose growth is dangerously out of control. The story of how Caulerpa taxifolia became famous as one of these species began in 1989, when Dr. Alexandre Meinesz, a marine biologist at the University of Nice in France, learned that this exotic alga, which is native to the Caribbean and other tropical seas, was thriving in the Mediterranean waters off the coast of Monaco. Upon investigation, Meinesz discovered that a mutant variety of C. taxifolia was dumped into the Mediterranean with other aquarium refuse by the prestigious Oceanographic Institute of Monaco. Eventually, the C. taxifolia was traced back to a stock developed at the Wilhelma Zoological and Botanical Gardens in Stuttgart, Germany. This stock of C. taxifolia had caught the attention of amateur and professional aquarists for its exceptional beauty and hardiness and had been widely distributed in public and private aquaria in the 1980s.

Instead of dying in the cold winter waters of the Mediterranean Sea as the tropical variety of C. taxifolia does, the mutant variety can withstand several months at temperatures that range between 10° and 13° C. In addition, the alga grows equally well on a variety of ocean substrates---sand, mud, or rocks--and from near the surface to depths of 50 meters. When temperatures exceed 18°C, the mutant Caulerpa grows at a remarkable rate, capable of elongating by 2 centimeters in a single day and forming a new frond every 2 days. A single square meter of seafloor can .........余下托福TPO72阅读内容省略！

托福TPO72阅读题目：

1.According to paragraph 1, what event first caused Caulerpa taxifolia to become publicly known as a damaging species?

A Marine biologist Alexandre Meinesz identified a variety of C. taxiolia growing in the Mediterranean near Monaco

B The Oceanographic Institute of Monaco disposed of a variety of C. taxiolia in the Mediterranean

C The Wilhelma Zoological and Botanical Gardens developed a new variety of C. taxifolia

D A variety of C. taxifolia became widely distributed in public and private aquaria

2. According to paragraph 2, which of the following is true of the mutant variety of C. taxifolia?

A It grows more rapidly on ocean substrates than near the surface of the sea

B It thrives only when temperatures rise above 18℃ 

C It dies when the temperature drops below 13℃

D It reproduces through fragmentation

3.What can be inferred from paragraph 2 about the reproduction of the tropical form of C. taxifolia?

A It is accomplished asexually and at a slower pace than that of the mutant form of C taxifolia.

B It may be accomplished sexually, from the union of male and female gametes

C It occurs due to fragmentation caused by both human activity and storms

D It takes place only in winter, when temperatures are colder

余下托福TPO72阅读题目省略！

3篇完整版托福TPO72阅读真题及答案下载，15元有偿！