Migration of animals be initiated by physiological stimuli such as reproductive changes, external pressures such as weather changes, or combination of either types of change

When scientists discovered how soap works, it became possible to do detergents out of Petroleum.

Chemical engineering is based on the principles physics, chemists , and math

A number of the Pacific Islands are volcanoes that have pushed up from ocean floor, the others are the tops sunken mountain ranges.

That it is believed that most of the earthquakes in the word occur near youngest mountain ranges – the Himalayas, the Andes, and the Sierra Nevada.

Urban consumers have formed co-operatives to provide themselves necessities such groceries, Household appliances, gasoline at a lower cost.

He never goes home before he will finish work.

One of most difficult questions in defining sleep is “What are functions of sleep?

Deciduous trees are ones that lose its leaves in the autumn and grow new ones in spring.

As the plane went more faster the runway, David began to sweat nervously.

So far most a million different species of insects have identified and named.

Photographs from a satellite are frequently used to generate the information is needed produce a map.

Choose the correct verb form:

Although we didn’t win, we were able to take some _____ from our performance.

Because of its vast tracts of virtually northern forest, Canada has one of the lowest population density in the world.

The bite of the Black Widow spider can be very inflammatory to the affected nerves hospitalization may be required.

She’s the woman ................ sister looks after the baby for us.

He never drinks wine, _________?

A progress has been made toward finding a cure for AIDS

Running along 180th meridian, the International Date Line is separated day from another

The development of professional sports in the United Stated dates back to nineteenth century.

Why didn t you give me a call yesterday? We  .................  discuss everything together.