Earth's mantle plays an important role in the evolution of the crust and provides the thermal and mechanical driving forces for plate tectonics. Heat liberated by the core is transferred into the mantle where most of it (> 90%) is convected through the mantle to the base of the lithosphere.
The <u><em>correct answer</em></u> is:
He needs to select a more representative sample.
Explanation:
Choosing students from the basketball team for the sample he uses on a study of heart rates and exercise will be a biased sample. This is because students on the basketball team are potentially healthier than other students, which means that exercise will not have a large an effect on their heart rate as it would if they were not as healthy and not as physically fit.
In order to reduce the amount of bias, he should choose students from different groups throughout the school.
<span><span>The plant body consists of two basic parts--- the </span>shoot system<span> and the </span>root system</span><span>Shoot system<span> is above ground and includes organs such as </span>leaves, buds, stems, flowers, and fruits</span><span><span>The functions of the shoot system include </span>photosynthesis, reproduction, storage, transport, and hormone production</span><span><span>The </span>root system<span> is below ground and includes </span>roots as well as modified stem structures<span> such as tubers and rhizome </span></span><span><span>The functions of the </span>root system<span> include </span><span>anchorage, absorption, storage, transport, and production of certain hormones Hope this is what you were asking for! :)
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Clean or green energy helps in releasing lesser air pollution and lesser carbon dioxide. That contributes in lowing down global warming and subsequent disasters like tsunami because of glacier melting , more unexpected climate changes like unexpected long-period storms, flood, typhoons, etc.
Hope this would help.
