Most species of Cimolestes were mouse to rat-sized, but the Late Cretaceous Cimolestes magnus reached the size of a marmot, making it one of the largest Mesozoic mammals known ( 20-60g ).

Most mammals have light skin that is covered by fur, and biologists believe that early human ancestors started out this way also.

Most morphological evidence comparing traits such as number and arrangement of teeth and structure of the reproductive and waste elimination systems favors a closer evolutionary relationship between marsupials and placental mammals than either with the monotremes.

Most genetic and molecular evidence also supports grouping marsupials and placental mammals as a single clade, subclass Theria.

Most differences between the opossom and placental mammals stem from non-coding DNA

Most other branches of life remained relatively unchanged in comparison to birds and mammals during this period.

Most female mammals have an estrous cycle, yet only primates ( including humans ) have a menstrual cycle.

Most frequently made from cows ' milk, butter can also be manufactured from the milk of other mammals, including sheep, goats, buffalo, and yaks.

Most of their diets consist of fish, but can also include crayfish, frogs, ducklings, snakes, muskrats, mice, other small mammals, and small birds.

Most tetrapod species possess a larynx, but its structure is typically simpler than that found in mammals.

Most humans, unlike most other mammals, do not have this ability.

Most mammals find this unpleasant, whereas birds are unaffected.

Most mammals normally become lactose intolerant after weaning, but some human populations have developed lactase persistence, in which lactase production continues into adulthood.

Most are found only on specific types of animals, and, in some cases, only to a particular part of the body ; some animals are known to host up to fifteen different species, although one to three is typical for mammals, and two to six for birds.

Most marine mammals are hypoosmotic and as a result they are constantly losing water to the surrounding environment.

Most grass-eating mammals are quite large and have a long digestive tract ; while guinea pigs have much longer colons than most rodents, they must also supplement their diet by coprophagy, the eating of their own feces.

Most storks eat frogs, fish, insects, earthworms, small birds and small mammals.

Most mammals in the park are nocturnal, and include Bennett's wallabies, Tasmanian Pademelons, brushtail possums, echidnas and platypus.

Most mammals are only active at night, so if you arrive early or leave late, you might be lucky enough to see one, such as Echidnas, Wallabies and Kangaroos.

Most mammals develop multiple nipples along each milk line, with the total number approximating the maximum litter size, and half the total number ( i. e. the number on one side ) approximating the average litter size for that species.

Most mammals and primates approach copulation from the rear instead of the common frontal position that humans often assume, so the clitoral stimulation is directly created by glans contact with the scrotum at the base of the penis and the different contractions of its corrugated dartos muscles.

Most of its food is obtained from the ground such as insects and other small invertebrates, small reptiles, small mammals, young birds and eggs, grain, peanuts, carrion and any scraps of human food and fruit.

Most cells of adult mammals spend about 20 hours in interphase, this accounts for about 90 % of the total time involved in cell division.

Most procellariid colonies are located on islands that have historically been free of mammals ; for this reason some species cannot help but be colonial as they are limited to a few locations to breed.

Most mammals do not lay eggs, but corresponding structures may be found inside the placenta.

Most extant marine reptiles, except for some sea snakes, are oviparous and need to return to land to lay their eggs.

Most reptiles are oviparous ( egg-laying ), although certain species of squamates retain the eggs until hatching and a few are viviparous ( give birth to live young ).

Most animals that lay eggs, such as birds and reptiles, including most ovoviviparous species, have an oviduct instead of a uterus.

Most of the other reptiles with anapsid skulls, including the millerettids, nycteroleterids, and pareiasaurs, became extinct in the late Permian period by the Permian-Triassic extinction event.

Most reptiles have well-developed claws.

Most reptiles also require some form of Ultraviolet radiation which can be provided through a UV bulb.

Most individuals focus on a particular field such as ecology, evolution, taxonomy, physiology, or molecular biology, and within that field ask questions pertaining to or best answered by examining reptiles and amphibians.

Most fish, reptiles and amphibians undergo a limited physiological colour change in response to a change in environment.

Most other reptiles can only walk in a sprawled position, and chameleons are the only modern reptiles with a more erect posture than crocodilians.

Most reptiles lack a secondary palate, but some skinks ( family Scincidae ) have evolved a bony secondary palate too, to varying degrees.

Most paleontologists hold fossilized jaw remains to be the distinguishing feature used to classify synapsids and reptiles.

Most opalines live as endocommensals in the large intestine and cloaca of anurans ( frogs and toads ), though they are sometimes found in fish, reptiles, molluscs and insects.

Most species are shrike-like, arboreal forest birds, feeding on reptiles, frogs and insects.

Most of the ships that the player encounters are similarly named after snakes, or other reptiles.

Most vegetation and animal life is typical for sandy deserts, scrub brush, reptiles ( including the Gila monster ) and small mammals.

Most female horse flies feed on mammalian blood, but some species are known to feed on birds or reptiles.

Most of the area ’ s wildlife has been extinguished with only various insects and reptiles to be found wild.

Most baby reptiles are born with the same instincts as their parents and leave to live on their own immediately after birth.

Most of the reptiles end up being relocated to uninhabited areas.

Most fauna here is small and medium sized mammals such as coyotes, skunks, rabbits and squirrels with reptiles such as rattlesnakes and birds such as crows, ducks and quail.