The answer is 1 – C. This region of the earth is called the mantle. This region is composed of ‘plastic’ rock. The plasticity is due to the fact that the temperatures are high enough to make the rocks liquid but they remain solid because of the high pressure in the region. The convection currents of the mantle are responsible for dragging along the continental plates of the earth’s crust, hence the tectonic movements.
Answer:
<em> A. 38%</em>
Explanation:
Percentage increase in carbon dioxide concentration = (Increase in concentration of carbon dioxide/initial concentration)×100
P = (C₂-C₁/C₁)×100...................... Equation 1
Where P = percentage increase in the concentration of carbon dioxide from 1970 to 2007, C₁ = The atmospheric concentration of carbon dioxide in 1970, C₂ = The atmospheric concentration of carbon dioxide in 2007.
<em>Given: C₁ = 278 ppm, C₂ = 383 ppm.</em>
Substituting these values into equation 1
<em>P = [(383-278)/278]×100</em>
<em> P = (105/278)×100</em>
<em>P = 37.7%</em>
<em>P ≈ 38%</em>
<em>Thus the approximate percentage increase in carbon dioxide concentration from 1790 to 2007 is 38%</em>
<em>The right option is A. 38%</em>
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The double membrane around the nucleus a called the nuclear envelope
<em><u>[</u></em><em><u> </u></em><em><u>TILT </u></em><em><u>]</u></em>
Explanation:
The 23.5° <u>tilt</u> in the Earth's axis of rotation.
Answer: Mitochondria
Explanation: The mitochondria make energy within the cell
