The approximately number of earths surface is covered by land is 29 percent
The biconcave cells in blood that lack nuclei when they are mature are the red blood corpuscles.
<u>Explanation:</u>
The blood contains a combination of cells especially the Red blood corpuscles, white blood corpuscles and the blood platelets. The major function of the Red blood corpuscles is to carry oxygen and supply to all the parts of the body from the lungs and similarly carry carbon dioxide and supply to all parts of the body . To facilitate this it does not have a nuclei.
When a temperature is at its dew point it means there is enough water in the air to the point where it cannot hold anymore at given temperature. This would make the humidity at 100%.
Meaning the answer is:
D. 100%