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- 12. 7: Vertebrate Evolution - Biology LibreTexts
They were the first vertebrates that no longer had to return to water to reproduce They could live just about anywhere Mammals and birds both evolved from reptile-like ancestors The first mammals appeared about 200 million years ago and the earliest birds about 150 million years ago
- Opossum - Wikipedia
The largest difference between the opossum and non-marsupial mammals is the bifurcated penis of the male and bifurcated vagina of the female (the source of the term didelphimorph, from the Greek didelphys, meaning "double-wombed") [38] Opossum spermatozoa exhibit sperm-pairing, forming conjugate pairs in the epididymis
- Investigating the Biotic and Abiotic Drivers of Body Size . . .
Bats are the second-largest group of mammals with short intestinal tract, yet their gut microbiome is still poorly studied Herein, we explored the relationships between gut microbiome and food composition, host taxa, body size, gender, elevation, and latitude
- From Blue Whales to Titan Beetles: A . . . - AZ Animals
They’re also the largest mammal in the world Blue whales can weigh as much as 200 tons and grow up to 100 feet long — longer than an NBA basketball court These animals are the heaviest known to have ever existed, surpassing any dinosaur in mass, and they are far bigger than the largest living land animal on the planet today
- North Atlantic Right Whale | Smithsonian Ocean
The Marine Mammal Collection at the Smithsonian’s National Museum of Natural History is the world’s largest It includes more than 6,500 specimens of cetaceans (whales, dolphins, and porpoises), 3,100 specimens of pinnipeds (fin-footed mammals like walruses and seals), and 380 specimens of sirenians (manatees and dugongs)
- The economics of brain size evolution in vertebrates - Cell Press
manage to get even larger over evolutionary time: more recently evolved lineages tend to have larger brains than the ones from which they emerged, and within lineages new species tend to havelargerbrainsaswell5,6 (Figure1) Thisquestionisespecially pressing given that our own species has, in terms of cortical
- Rodent - an overview | ScienceDirect Topics
Although laboratory rats and mice constitute over 90% of all vertebrates used in research, other species, such as hamsters, guinea pigs, and more recently woodchucks, have also been widely used and have contributed significantly to innovations in the biomedical sciences (see Animal Models in Biomedical Research)
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