The oldest living animal species on earth cannot be known for sure, because not every animal species or fossil (化石) has yet been discovered, but the current best guess is the horseshoe crab (马蹄蟹), which has remained pretty much unchanged since the Ordovician (奥陶纪) period, 445 million...
The lifespans of different animal species have long fascinated us humans, with writings on the subject dating back to Aristotle. Keeping track of the world’s oldest animals is important as it enables us to gain an understanding of why some species live longer than others. Studyin...
The oldest living animal species on Earth cannotbe known for sure, because not every animal speciesor fossil has yet been discovered, but the current bestguess is the horseshoe crab, which has remainedpretty much unchanged since the Ordovician(奥陶纪)period,445 million years ago.Due to its statu...
The biomarker they identified has a unique structure that is currently only known to be synthesized by certain species of modern sponges called demosponges, according to the study. "This steroid biomarker is the first evidence that demosponges, and hence multicellular animals, were thriving in ancie...
【题目】阅读理解BThe oldest living animal species on earth cannot be knownfor sure, because not every animal species or fossil has yet beendiscovered, but the current best guess is the horseshoe crab,which has remained pretty much unchanged since the Ordovician(奥陶纪)period, 445 million years ...
(4)__Also, trees produce a number of fruits and nuts which are sold at market.Some trees are even used to make medicines.(5) T hey provide shelter and food for a number of animal species across the globe.T rees are especially important as they form green corridors connecting habitats ...
Currently, the number of formally described species in this family is 66,4448, which makes them the most species rich animal family on Earth as known by today9. Although some myrmeco- and termitophilous Staphylinidae display features that could be associated with the paedomorphic syndrome10, ...
An underwater picture of the modern demosponge species Rhabdastrella globostellata, which make the same 26-mes steroids that the researchers found in ancient rocks. Credit: Paco Cárdenas Researchers at the University of California, Riverside, have found the oldest clue yet of animal life, dating...
(金字塔是至今仍屹立不倒的最古老的建筑之一。) “longest-lived”解释:字面意思是“活得最长的”,常用于描述生物或事物存在的时间非常长。例句:This species of turtle is known for being the longest-lived animal on Earth. (这种海龟是地球上已知寿命最长的动物。)...
The rove beetles, Staphylinidae, are not only one of the most abundant beetle families, but also the most speciose family in the animal kingdom, with over 65,000 described species in 33 subfamilies1,2. The oldest fossil record of Staphylinidae dates back to the Middle Jurassic and are repre...