Sentences with phrase «occurred over evolution»

So, if we know the number of speciation events that occurred over evolution's history, we could calculate the number of species that have lived on the earth.

Not exact matches

We do know that a slow hange over time does occur and that was the basis of Darwin's notional hypothesis, but 40 years ago geology proved that species occur rapidly following a mass extinction, the opposite of evolution.

A common way to use the term evolution is simply to describe the change in the gene pool of a population over time; that this occurs is an indisputable fact.

In myh experience most thing evolution is some «random» change that occurs over time for no reason at all.

Majority of species appeared in a very short geological time — The Cambrian explosion occurred 530 billion yrs ago, and the rate of evolution accelerated over 70 - 80 billion years (now I hope we understand that figure)!

by its definition evolution occurs over long periods of time.

3At present, for example, the well - entrenched neo-Darwinian hypothesis of «gradualism» (biological evolution occurs slowly, and more or less continuously as the constant interplay of random variations and natural selection over vast periods of time) is confronted with a somewhat more radical and neo-Lamarckian theory of «punctuated equilibrium» favored by Harvard biologists Stephen Jay Gould and Peter Williamson, collaborated by fossil discoveries of paleontologist and cultural anthropologist Richard Leakey in Africa.

The only way they can hold the existing party together is to hope for an evolution in thought over the next 4 years, producing a more socially liberal base (possible... but won't happen quickly) or to have some other very large even occur which puts the dems in such a bad light as to lift the pressure (possible, but won't reverse the social trends).

On the other hand, the presence of a complex and highly developed «culture» among mammalian species (e.g., primates) do not seem to have occurred over the period of biological evolution on earth.

It seems as though many parents have missed the total evolution of the cloth diaper that has occurred over the past decade or so.

«It's all about the time scale over which evolution occurs in relation to the timing of the changes now occurring in the environment, because there are likely to be mismatches,» he said.

They contain stratigraphic cycles and patterns that precisely reveal the succession of climatic and tectonic conditions that have occurred over millennia, thereby enhancing our ability to understand and predict the evolution of our planet.

When geneticists offer contrary ideas about how speciation occurs, they're debating the nuts and bolts of how evolution works, not arguing over whether it happens.

There are over 250 species of cichlid in the lake: their presence seems to have blinded biologists to other examples of evolution in action occurring there.

Importantly, the organoids developed genetic changes that occurred over time, a phenomenon known as clonal evolution.

The evolution of bone cancer pain in dogs parallels what occurs in humans, with the frequency and intensity of pain increasing over weeks and months.

Evolution is typically thought of as a process that occurs over hundreds or thousands of years, but this doesn't mean that we can not observe genetic changes as they develop.

«Evolution» is the best term for what has been occurring over the past several years, and there's no sign that our evolution has ceased (except for, ya know, the state of American political diEvolution» is the best term for what has been occurring over the past several years, and there's no sign that our evolution has ceased (except for, ya know, the state of American political dievolution has ceased (except for, ya know, the state of American political discourse).

Selection is not a one - time event — Evolution of a teacher leadership program and turnover among teacher leaders means that selection occurs over and over.

Given evolution over the past 500 million years when virtually all modern emerged and radiated largely occurred while the planet had no polar ice caps and atmospheric CO2 up to ten times current level, and the planet was green from pole to pole, and life did so well it was able to sequester huge amounts of energy in fossil fuel beds.

GOAL 1: Examine the historical evolution of the arctic ice - ocean system from 1948 to 2003 to understand the large - scale changes that have occurred in sea ice and the upper Arctic Ocean over this time period.

There are many public intellectual debates occurring over scientific and skeptical issues — the place of creationism vs evolution in public science classes, the including of alternative medicine in academic curricula, the validity of debate on global warming, etc..