故选A。(2)推理判断题。根据第三段Although many reptiles live in dry environments such as deserts,most species occur in forests,where they suffer from threats such as logging of land for agriculture.30% of the forest-d
For reptiles, taxonomic ignorance plausibly explains the apparent difference in mean age of species between the Southern and Northern Hemispheres; but this explanation can apply to amphibians only if a vast number of Southern taxa remain to be described.doi:10.1111/j.1420-9101.2011.02417.x...
根据第一段中“A recent report says that more than one-fifth of the world’s reptiles are at risk of going extinct.(最近的一份报告称,世界上超过五分之一的爬行动物面临灭绝的危险。)”可知,超过20%的爬行动物物种面临灭绝的风险。故选C项。【小题2】细节理解题。根据第三段中“The main reason ...
Both crocodiles and dinosaurs came from the crown group Archosaurs, which were reptiles that included birds, crocodiles, pterosaurs, and dinosaurs. Crocodilesandalligatorsare sometimes referred to as “Living Fossils” because they look a lot like dinosaurs. Think about a T-Rex for a minute. They...
These reptiles have roamed the oceans for 100 million years. We've put them at risk, but with a little help, they're rebounding.
Foralmostacentury,Ecuador'sgianttortoises(陆龟)havebeenprotected.Thesespeciesareoneofthelargestlivingreptiles(爬行动物)ontheplanet.Theyliveaverylonglife—theoldesttortoiseonrecordwas175yearsold.And,theyallliveontheGalapagosIslands.HuntingthetortoisesisillegalunderEcuador'slaws,butnowtheAttorneyGeneral'sofficehasopen...
Reptiles and amphibians are animals that have some commonalities and some differences, and are often confused. They have distinct features that place them into their own classes. Both are cold-blooded vertebrates, meaning they have backbones and internal skeletons, and must rely on their environment...
1Facts About ReptilesSnakes, lizards, crocodiles, alligators,turtles and tortoises are all reptiles(爬行动物).There are about 6,500 known species of reptiles in the world.Reptiles are cold-blooded so they usually live in warm places. Reptiles need heatfrom the sun to warm their bodies before ...
and is on display at the Field Museum in Chicago. An in-depth examination reveals the tell-tale sign of eight arms and two eyes. This suggests that long before life on land had progressed beyond small pre-dinosaur reptiles, octopuses had already established their shape millions of years ago....
Cause: This infection is caused by salmonella bacteria, which can be found in foods like sprouts and eggs and in animals from pigs and poultry to reptiles, amphibians and rodents (including hedgehogs). According to the report, "salmonella has been found in high levels in sur...