Sentences with phrase «variations in the species»

Darwin, on the other hand, tended to look solely at the external phenomenon of the organism's response to conditions in the environment and to ascribe to such response the initiation of change or variation in the species.

The facing heaven chiles are probably C. annuum, as most frutescens look like tabasco, with very little pod variation in that species.

«Nutrients are important for explaining the remaining variations in species distribution that is not explained by drought tolerance,» she adds.

Local variations in the environment appear to be a much more accurate predictor of species shifts than variations in the species life histories and other factors.

However, several genetic mechanisms — including the evolution of protein - coding sequences and gene duplication, as well as the evolution of regulatory sequences — are sources of variation in all species and contribute to organismal adaptation.

It covers variation in species, how they feed, how they communicate, migration, and record breaking species.

Variation in species numbers can not be explained by the increase in area, even when incorporating estimations of changes in environmental conditions (interpreted logarithmically from the intercept) and the rate of increase due to the species present (interpreted from the gradient of the regression line).

It covers variation in species, how they feed,...

The marine life and variations in species is incredible, and only a few liveaboards are actually travelling around out there.

Long - term effects of warming and ocean acidification are modified by seasonal variation in species responses and environmental conditions

Long - term effects of warming and ocean acidification are modified by seasonal variations in species responses and environmental conditions

Geographical variation in species» population responses to changes in temperature and precipitation

Not exact matches

Evolution — including what Mr Ham would call «micro-evolution» resulting in variations within a species (like the degrees of melanin concentration in the human species) takes longer than a couple of thousand years in a complex organism.

Both in the fossil record, in observable trends in a few species and in DNA variation over time and place.

Indeed... if the regularity of a variation prohibiting procreation became 100 % (or likely any percentage of enough significance) the species would in fact die out.

We are accustomed to regard a man as an individual of the species «man,» a being endowed with definite capacities, the development of which brings the human ideal in him to realization — of course with variations in each individual.

Now in between those species there are variations....

The famous Dr. Charles Hodge of Princeton Seminary pointed to this when he said that in Darwinism «species owe their origin, not to the original intention of the mind; not to the special acts of creation calling new forms into existence at certain epochs; not to the constant and everywhere operative efficiency of God, guiding physical causes in the production of intended effects; but the gradual accumulation of unintended variations of structure and instinct.

When I see dinosaur bones or variations of one species in our world, then its personally clear to me of evidence of evolution.

Some examples: that «every single organic being around us may be said to be striving to the utmost to increase its numbers»; that «of the many individuals of any species which are periodically born, but a small number can survive»; that it is to a mother's «advantage» that her child should be adopted by another woman; that «no one is prepared to sacrifice his life for any single person, but... everyone will sacrifice it for more than two brothers, or four half - brothers or eight first cousins»; that «any variation in the least degree injurious [to a species] would be rigidly destroyed.»

I agree with Douglas Farrow's first two theses — that homo sapiens is a sexually dimorphic species and so characterized more by differences between male and female than by variation — but with the qualification that these sound like empirical claims, and it is perfectly conceivable that advances in reproductive technology might make sexual dimorphism and difference irrelevant.

The chiltepin and related bird peppers, the wild forms of the cultivated species, are known to chileheads, but their variations in pod shape and size are not readily apparent.

«Identifying which of these candidate genes actually causes variation in responses to cold snaps will give us the potential to understand whether evolution to climate change can occur in both wild and domesticated animals, allowing us to better predict which species or breeds will be «winners» and «losers» and to better mitigate the effects of anthropogenic climate change on a wide range of organisms from beneficial pollinators to invasive pests,» said Theodore Morgan an associate professor of evolutionary genetics in the Division of Biology at Kansas State University and senior author of the study.

They made these clones by a process called automatic parthenogenesis: The egg is formed normally (with half the species» usual number of chromosomes), then fertilized by the «polar body,» a cell that is created during oogenesis and contains the same gene copies as the egg, resulting in the shark having half the genetic variation of its mother.

Importantly, plants also exhibit genetic variation in their responses to pests and invasive species that can be used to mitigate their negative effects.

In some cases, a single species may show a high level of morphological variation, while in other cases, multiple morphologically similar species may be hidden under a single species namIn some cases, a single species may show a high level of morphological variation, while in other cases, multiple morphologically similar species may be hidden under a single species namin other cases, multiple morphologically similar species may be hidden under a single species name.

The results of a large - scale survey of venom variation in the two snake species, published January 8, 2015 in the journal Genetics, challenge common assumptions in venom evolution research, provide crucial information for rattlesnake conservation, and will help coral snake antivenom development.

To address this problem, a research team led by Associate Professor Shunsuke Utsumi and a doctoral student Shinnosuke Kagiya of Hokkaido University studied genomic variation in a foundation tree species to predict an arthropod community.

The variation between eastern diamondback populations could provide crucial information to authorities managing the conservation of this species, which is in decline and under consideration for listing as threatened under the Endangered Specispecies, which is in decline and under consideration for listing as threatened under the Endangered SpeciesSpecies Act.

In contrast, mitochondrial DNA (mtDNA) markers tend to mutate more slowly than microsatellites, often including variation specific to a particular species rather than an individual or population.

What they found was lots of back - and - forth variation in the population and then — whoop — a whole new species.

Temperamental variation — call it personality — also helps a species survive in a volatile, supercompetitive milieu by ensuring that different individuals respond differently to changing conditions, so some will thrive.

A truly evolutionary view of our species recognizes that variation is not some noise in the system, but is the system itself.

Variation in insect diet has implications for numerous ecological and evolutionary processes, including effects of environmental disturbance, the stability of networks of interacting species and the top - down effects of predators being controlled by the level of herbivore diet specialization.

However, microbe diversity did not vary by forest type in the other three species, suggesting that variation was instead due to factors intrinsic to individual species and their habitats.

In this study, published in the journal Royal Society Open Science, the researchers mapped the global occurrence of mammalian species living in different social systems to determine how averages and variation in rainfall and temperature explain species distributionIn this study, published in the journal Royal Society Open Science, the researchers mapped the global occurrence of mammalian species living in different social systems to determine how averages and variation in rainfall and temperature explain species distributionin the journal Royal Society Open Science, the researchers mapped the global occurrence of mammalian species living in different social systems to determine how averages and variation in rainfall and temperature explain species distributionin different social systems to determine how averages and variation in rainfall and temperature explain species distributionin rainfall and temperature explain species distributions.

Animals have incredible variation in their body shapes and ways of life, including the plant - like, immobile marine sponges that lack heads, eyes, limbs and complex organs, parasitic worms that live inside other organisms (e.g. nematodes, platyhelminths), and phyla with eyes, skeletons, limbs and complex organs that dominate the land in terms of species numbers (arthropods) and body size (chordates).

They were thus able to study the geographical variation in the percentage of large species that became extinct on a much finer scale than previously achieved.

Ibrahim cites variation among fossils of T. rex, as well as its wide geographic distribution — the iconic dinosaur has been found in both Texas and Canada, for example — when dismissing his critics» argument that a single spinosaurid species was unlikely to have lived in both Morocco and Egypt during the middle of the Cretaceous period.

«What this study has shown is that evolutionary processes can increase rates of movement, but also variation in how fast species move, and allow us to get a better sense of where organisms might go in the future.»

Variation in body mass distribution is expected to have consequences for the conversation of particular species.

A comprehensive new study looking at variations in Ichthyosaurus, a common British Jurassic ichthyosaur (sea - going reptile) also known as «Sea Dragons», has provided important information into recognizing new fossil species.

They determined that a single hindfin alone could not be used to distinguish among species of Ichthyosaurus, but that a particular variation was more common in certain species.

Variation in winter coat color may protect species with winter camouflage — such as hares, weasels, and foxes — when the climate warms.

To determine what level of a toxin is safe, researchers take a dose that has no observed toxicological effect in an animal and divide it by 10 once (to account for the differences between species) and then again (to account for variations among humans» ability to handle toxins); for pesticides, the dose is then divided by 10 a third time (to allow for the extraordinary sensitivity of babies and children).

in the May issue claims that biologists say the concept of race is biologically meaningless, presumably because «any large human population has about 85 percent as much genetic variation as the species as a whole.»

Many species show substantial variation in organ size and shape that could be produced by regional differences in scaling.

Researchers had to sift through 100 square - meters of forest floor for every four or five of the rare specimens, then use a high - power microscope and micrometer measuring tool to note variations in size, the shape of their mandibles, and patterns of hair on their exoskeletons — all defining characteristics of individual species.

«Prior to the 2016 mass bleaching event, we observed significant variation in the number of fish species, total fish abundance and functional diversity among different fish communities.

«The relationship between colour variation and stability was independent of activity period or host plant range, since the more stable species with large variation in colour drawing were not restricted in their activity to a shorter part of the year or to a narrower range of host plants.