The answer should be proteins. Because the protein is consists of different kinds of amino acids(usually 20 in total). And our cell can not produce essential amino acids itself.
Answer:
<em>The evidence that suggests RNA appeared before DNA is the fact that RNA can act as an enzyme to self-edit their own genetic code. </em>Moreover, it has the ability to store genetic information, while transfer and ribosomal RNA have the ability to translate genetic information into proteins.
Explanation:
RNA has a great capability as a genetic molecule, it once had to carry on hereditary process on its own. It is absolutely sure that RNA was the first molecule of heredity. However, a single stranded RNA is rather unstable and easily damaged by enzymes. By essentially multiplying the existing RNA molecule, and using deoxyribose sugar instead of ribose.
<em>The DNA evolved as a much more stable form to pass genetic information with accuracy. It shows a biological evolutionary purpose .</em>
<em />
The difference between topsoil and garden soil is an even finer distinction than the difference between soil and dirt, and it has to do with the amount of organic matter, and to a lesser extent, the types of trace minerals and the ratio of clay, sand and silt. Garden soil is a category of topsoil
Gazelles are adapted to live in Savannas.
<em>(Answer is D)</em>
<em>-Jen</em>
Energy is transfered from a molecule of sugar to atp by cellular respiration
