This commission would keep environmental scorecards on UN member nations.

Mr. Yates, are you with an environmental group?

And most of the remaining populations have been significantly reduced by overfishing and environmental challenges.

Clearly some environmental factor was responsible for the greater survival rates of dark moths.

The importance of any factor will vary with the particular phytoplankton species and the environmental conditions.

Between 25,000 and 10,000 years ago, Siberia, the Bering Land Bridge, and Alaska shared many environmental characteristics.

So it's a complicated environmental picture.

But to me, what's most interesting about this process is how it may enable fungi to help clean up environmental pollution in the soil.

Many organisms have developed the ability to survive in harsh environmental conditions: extreme heat or cold, or very dry conditions.

I mean obviously we need a better way to manage environmental resources.

Ok, but the problem is privatization doesn't necessarily result in better management of an environmental resource.

For many years scientists assumed that a cooling of the climate was responsible, with dinosaurs being particularly vulnerable because, like modern reptiles, they were ectothermic (dependent on environmental heat, or cold-blooded).

Seeds of a given species exhibit a wide range of germination dates, increasing the probability that at least some of the seeds will germinate during a period of favorable environmental conditions.

Professor, since we are going to talk about changes in animal populations in the wild, I’d like to ask about something I read in an article online, about how the population size of some animal species can affect other animal species, and how other environmental factors come into play too.

There are always going to be environmental factors that limit population growth.

This is called environmental resistance.

Environmental resistance is important because it stops populations from growing out of control.

No significant discontinuous were observed, leading Sheldon to conclude that environmental conditions were quite stable during the period he examined.

Slow, continuous change may be the norm during periods of environmental stability, while rapid evolution of new species occurs during periods of environmentstress.

Without predators, the species that is the best competitor for food, shelter, nesting sites, and other environmental resources tends to dominate and exclude the species with which it competes.

It protects against environmental hazards such as wind and sun.