Noun:

நஞ்சுக்கொடி,

placentals தமிழ் அர்த்தத்தின் உதாரணம்:

None

placentals's Usage Examples:

Other distinctive features by which marsupials are separated from monodelphians or placentals will be found in the article last mentioned.

) The existing monotremes and marsupials are each represented only by a single order; but the placentals are divided into the following ordinal and subordinal groups, those which are extinct being marked with an asterisk (*) i.

Finally, there is the hypothesis that marsupials are the descendants of placentals, in which case, as was suggested by its discoverer, the placenta of the bandicoots would be a true vestigial structure.

According to the latter, the early monotremes which became specialized into modern monotremes, gave rise to the ancestors of the modern marsupials; while the modern placentals are likewise an offshoot from the ancestral marsupial stcck.

On the other hand, there are those who believe that the functional dentition (other than the replacing premolar and the molars) correspond to the milk-dentition of placentals, and that the rudimentary tooth-germs represent a "prelacteal" dentition.

On the assumption that these functional teeth correspond to the milk-series of placentals, "marsupials in this respect agree exactly with modern elephants, in which the same peculiarity exists.

With the exception of this replacing pair of teeth in each jaw, it is considered by many authorities that the marsupial dentition corresponds to the deciduous, or milk, dentition of placentals.

In the advance of their molar teeth from a tritubercular to a grinding type, the author traces a curious parallelism between marsupials and placentals.

There is much to be urged in favour of either view; and in adopting the former alternative, it must be borne in mind that the difference between monotremes and marsupials is vastly greater than that which separates the latter from placentals.

The group, which has also the alternative title of Didelphia, is by some authorities regarded as a sub-class of the mammalia of equal rank with the Monotremata, while by others it is brigaded with the placentals, so that the two together form a sub-class of equal grade with the one represented by the monotremes.

Others however (inclusive of Tritylodon and Microlestes, if they be really mammals), seem nearer to the Monotremata; and the question has yet to be decided whether placentals and marsupials on the one hand, and monotremes on the other are not independently derived from reptilian ancestors.

With regard to the evolution of marsupials and placentals, it has been pointed out that the majority of modern marsupials exhibit in the structure of their feet traces of the former opposability of the thumb and great toe to the other digits; and it has accordingly been argued that all marsupials are descended from arboreal ancestors.

Synonyms:

hyrax, Orycteropus afer, aardvark, Eutheria, digitigrade mammal, proboscidean, tree shrew, Fissipedia, plantigrade, edentate, hoofed mammal, scaly anteater, mammalian, cow, coney, chiropteran, anteater, subclass Eutheria, bull, dassie, livestock, digitigrade, aquatic mammal, farm animal, placental mammal, proboscidian, primate, carnivore, buck, pangolin, mammal, Ungulata, rodent, unguiculate mammal, cony, flying cat, ungulate, eutherian, das, pachyderm, doe, unguiculate, ant bear, colugo, insectivore, Unguiculata, plantigrade mammal, lagomorph, flying lemur, eutherian mammal, stock, bat, gnawing mammal, gnawer, yearling,

Antonyms:

plantigrade mammal, digitigrade mammal, odd-toed ungulate, even-toed ungulate, woman,