<span>It's the third option.</span>
Ecological foot print. 4.) Fertile soil is a valuable natural resource.
Explanation:
Answer:
The phopholipid tail is hydrophobic, since it is composed of two fatty acids.
Explanation:
Phospholipids are the fat molecules that mainly compose the cell membranes, forming a double layer.
The phospholipid molecules are formed by glycerol and phosphate group, located in the head, and a tail formed by fatty acids.
The pole formed by the phosphate group is hydrophilic —since it is polar in nature— while the end formed by fatty acids, the tail, is hydrophobic.
In the plasma membrane, the hydrophobic end is located towards the surface, while the hydrophilic portion is located in the center of the lipid bilayer.
the answer for this is coal
Answer:
Many scientists favor the RNA world hypothesis, in which RNA, not DNA, was the first genetic molecule of life on Earth. Other ideas include the pre-RNA world hypothesis and the metabolism-first hypothesis. Organic compounds could have been delivered to early Earth by meteorites and other celestial objects.
Explanation: