Their lack of eyes, a morphology not well-suited for swimming, and their fossils found in association with other benthic trilobites all suggest a benthic ( bottom-dwelling ) mode of life.

Their prototypes are the oldest winged fossils, go back to the Devonian, and are different in several respects from the wings of other insects.

Their gut is a straight, undifferentiated tube, which in some fossils is found to be filled with sediment.

Their formation can be the result of localized precipitation due to small differences in composition or porosity of the host rock, such as around fossils, inside burrows or around plant roots.

Their modern centre of endemism is western South Africa and Namibia ( Brandberg Massif ), although a relict population, and Eocene fossils suggest a wider ancient distribution.

Their development were likely amphibian, though no larval fossils are known.

Their fossils occur in ancient beds deposited in both freshwater and marine environments.

Their earliest direct ancestors, though not documented by fossils yet, likewise can be assumed to have been contemporaries with the dinosaurs.

Their fossils were first discovered in North Pakistan in 1979, at a river not far from the shores of former Tethys Sea.

Their perceived decline in the early Cretaceous is most likely a bias in fossil sampling, as most fossils are known from Europe and North America.

Their fossils were first discovered in North Pakistan in 1979, located at a river not far from the shores of former Tethys Sea.

Their fossils range from near the beginning of the Devonian until the Late Devonian.

Their fossils are found chiefly in the northeastern United States, southwestern Ontario, and in Morocco.

Their fossils can still be found in balled-up positions 400 million years later.

Their age has been determined by means of sea fossils found inside them.

Their claim about fossils is based on a YEC misunderstanding of how rocks are dated relative to each other, and how the geologic column was constructed.

Their fossils have been found in California, Washington and Japan.

Their fossils have been found the drier areas of New Zealand, and only in the lowlands.

Their fossils occur most commonly in marine calcareous, microbialitic mudstones with extensive mudcracks or shelly packstones, generally mid-Silurian to early-Devonian in age.

Their fossils are the largest and most impressive of the finds at the excavation of Fort Bridger in Wyoming, and were a focal point of the Bone Wars between Othniel Charles Marsh and Edward Drinker Cope.

Their fossils have been found in China, England, and Arizona.

Their fossils are found chiefly in Australia.

Their fossils are found chiefly in Australia.

Their fossils are found chiefly in Australia.

Their burgeoning popularity may be a result of the closing of the 52nd Street burlesque joints, but curiously enough their atmosphere is almost always familial -- neighborhood saloons with a bit of epidermis.

Their codes of ethics or statements may proscribe anthropologists from giving secret briefings.

Their ribs are usually short and may be fused to the vertebrae.

Their numbers have dwindled to about 2, 000 as a consequence of disease and disruption of traditional lifestyles, though people with partial Aleut descent may number around 15, 000.

Their behavior may become aggressive, intolerant, or intrusive.

Their use by expectant mothers shortly before the delivery may result in a floppy infant syndrome, with the newborns suffering from hypotonia, hypothermia, lethargy, and breathing and feeding difficulties.

Their makeup starts with a flesh tone base and may make use of anything from glasses, mustaches and beards to freckles, warts, big ears or strange haircuts.

Their mechanism of action may be related to inhibition of adherence of Escherichia coli to urothelial cells.

Their personality becomes disorganised and bizarre ; irrational behavior, associated with earlier denied aspects of self, may erupt uncontrollably.

Their flowers may have superior ovaries ( i. e., above points of attachment of the sepals and petals ), and areoles that produce further leaves.

Their fur may serve as a chemical defence, as it is full of parasite repellents that give the animal a characteristic scent.

Their absence may indicate a problem with nerve function or blood supply in the penis.

Their food consisted of " rice, biscuits, yams, tinned beef, and tea, with a few cocoanuts for those who may fall sick ".

Their flow, again, may be viewed as arising from the geometry of the magnetic field ( rather than from any driving voltage ), a consequence of " Ampére's law " ( embodied in Maxwell's equations ) which in this case requires an electric current to flow along any interface between magnetic fields of different directions and / or intensities. The circuit of tail currents

Their reflective surfaces may be either flat or curved.

Their fellow judges ' decisions may be persuasive but are not binding.

Their top priority is PKU, as it has become increasingly common, and sufferers often bear children who will be carriers of the recessive gene, and may themselves live past the age of sixty.

Their proposed benefits may vary from person to person.

Their authority may include the power to arrest unrelated males and females caught socializing, anyone engaged in homosexual behavior or prostitution ; to enforce Islamic dress-codes, and store closures during Islamic prayer time.

Their office or position is the priesthood, a term which also may apply to such persons collectively.

Their ability to recognize pain may be blunted by illness or the use of multiple prescription drugs.

Their transport may be based on a so-called " piggy-back " mechanism: such proteins associate with PTS1-possessing matrix proteins and are translocated into the peroxisomal matrix together with them.

Their pedigree may also be a factor.

Their low tolerances for high-temperature areas may render red pandas unsuitable as pets in some areas, or special care would be needed to keep them happy.

Their milk may also be of great medicinal or nutritional benefit due to its high protein content.