Reading and Writing fill in the blanks practice exercise. Below is text with blanks. Choose the correct word for each blank to complete the text.
Colorful poison frogs in the Amazon owe their great (1…………..) to ancestors that leapt into the region from the Andes Mountains several times during the last 10 million years, a new study from The University of Texas at Austin suggests.
This is the first study to show that the Andes have been a major (2………….) of diversity for the Amazon basin, one of the largest (3……………..) of biological diversity on Earth. The finding runs (4……………) to the idea that Amazonian diversity is the result of evolution only within the tropical forest itself.
“Basically, the Amazon basin is a ‘melting pot’ for South American frogs,” says graduate student Juan Santos, lead author of the study. “Poison frogs there have come from multiple places of (5…………….), notably the Andes Mountains, over many millions of years. We have shown that you cannot understand Amazonian biodiversity by looking only in the basin. Adjacent regions have played a major role.”
1. Diversification, diversity, diversify, division
2. Origin, source, stem, gap
3. Stock, inventory, reservoirs, storage
4. Opposite, counter, contrary, deep
5. Origin, sources, stem, gap
« Previous 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 Next »
