Currently, because of human activity, the actual background rate is tens of thousands of times higher, meaning species are becoming extinct much faster than they should be. Studies have found that some species lost from Earth would have continued to survive for 800 to 10,000 years without the...
The researchers point out that while China is currently the world’s largest emitter of carbon emissions, with the USA at number two, if you counted consumption emissions (meaning you made the USA count the emissions for all the stuff they use that’s made in China), they’d swap places ...
a group of semi-aquatic ambush predators found predominantly in freshwater habitats of the tropics11. Of the 25–27 extant species of Crocodylia currently recognized, seven are categorized as Critically Endangered
11. Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information.1 ○Until recently, nobody realized that Earth is exposed to unpredictable violent impacts fro...
1. The word “pose”in the passage is closest in the meaning to ○claim ○model ○assume ○present 【Paragraph 2】If an impact is large enough, it can disturb the environment of the entire Earth and cause an ecological catastrophe. The best-documented such impact took place 65 million year...
some of which are more than a little outlandish. The two main 'serious' theories are the asteroid and volcano theories, both of which make some use of the analysis of the rocks in and around the K-T boundary (meaning the boundary between the Cretaceous period and the Tertiary period). In...
burst into flames. The bolide struck an area of the Yucatan Peninsula of Mexico known as Chicxulub, excavating a crater 15-20 kilometers deep and at least 170 kilometers in diameter. The impact displaced huge volumes of seawater, causing much flood damage in the Caribbean. Meanwhile, the ...
There are two possible reasons for this increase [34,48]: (i) the first is high temperature induction of chromosome doubling. In a newly fertilized immature embryo or germ cell, active division occurs, meaning it is easy to induce polyploidy by sudden temperature increases (but not as high ...
When the bolide struck, this energy was released and generated a huge shock wave that leveled everything for thousands of kilometers around the impact and caused most of the landscape to burst into flames. The bolide struck an area of the Yucatán Peninsula of Mexico known as Chicxulub, ...
There is increasing evidence that the impacts of meteorites have had important effects on Earth, particularly in the field of biological evolution. Such impacts continue to pose a natural hazard to life on Earth. Twice in the twentieth century, large meteorite objects are known to have collided ...