eutherian वाक्य
उदाहरण वाक्य
मोबाइल
- However, recent studies have revealed that cimolestans are more likely to be basal, non-placental eutherians, with no living descendants.
- Taeniodonts are unambiguously non-placental eutherians, and part of Cimolesta; " Cimolestes " is the immediate outgroup to Taeniodonta.
- Placentals are unique among all mammals, including other eutherians, in having lost epipubic bones and having been able to develop proper pregnancy.
- It is the earliest known representative of Taeniodonta, a specialised lineage of non-placental eutherian mammals otherwise found in Paleocene and Eocene deposits.
- These pouches can often be exposed to maternal faeces and urine, a highly different environment to the sterile intrauterine environment seen in eutherian embryos.
- However, unlike eutherian mammals, epitheliochorial placentation is not maintained by maternal tissue as embryos do not readily invade maternal tissue outside of the uterus.
- In 1960, Medawar and Burnet were awarded the immunological mechanisms that mediate protection of the developing eutherian fetus from the immune responses of its mother.
- One model for the induction of tolerance during the very early stages of pregnancy is the Eutherian Fetoembryonic Defense System ( eu-FEDS ) hypothesis.
- The Zalambdalestidae are almost certainly unrelated to any of these groups; they probably represent more basal Eutherians and might not even be true Eutherians at all.
- The Zalambdalestidae are almost certainly unrelated to any of these groups; they probably represent more basal Eutherians and might not even be true Eutherians at all.
- ""'Borisodon " "'is an extinct genus of eutherians which existed in what is now Kazakhstan during the Turonian age.
- The dental traits " Ocepeia " shares with primitive eutherians include large canines, simplified premolars, and the above-mentioned lack of a hypocone.
- Like other entelodonts, " Entelodon " had complete eutherian dentition ( 3 incisors, 1 whales than pigs, its skull was generally pig-like.
- 19th century scientists believed that marsupials and eutherians had evolved from the same primitive ancestor and were looking for a living specimen that would act as the missing link.
- Since " Juramaia ", the earliest known eutherian, lived 160 million years ago in the Jurassic, this divergence must have occurred in the same period.
- Slaughter argued that " Pappotherium " should have been a basal form close to the metatherian-eutherian divergence point; this mammal likely was an arboreal insectivore.
- Goannas are known for their digging abilities and strong sense of smell, and are believed to have been the main predators of the echidna before the introduction of eutherian mammals.
- Dryolestid dentition is thought to resemble the primitive mammalian dentition before the marsupial-eutherian differentiation and dryolestids are candidates to be the last common ancestor of the two mammalian subclasses.
- Genetically speaking, the aardvark is a living fossil, as its chromosomes are highly conserved, reflecting much of the early eutherian arrangement before the divergence of the major modern taxa.
- Twenty-two sequences of non-bat eutherian mammals revealed a total number of 20 nonsynonymous mutations in contrast to half that number of bat sequences, which showed 44 nonsynonymous mutations.
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