<span>L-amino acids and D-sugars are part of every protein.
All proteins are made up of them.
The fact that all biological systems use L-amino acids and D-sugars is linked with the idea that certain groups of organisms come from a common ancestor because. The reason is that if the common ancestors used L-amino acids and D-sugars, than its offsprings use them as well.
</span>
Answer:brightly colored males
Explanation: for apex
Explanation:

Seed formation without fertilization in flowering plants involves the process of ---
A) APOMIXIS
Answer:
basic unit of mass
Explanation:
A kilogram is very nearly equal (it was originally intended to be exactly equal) to the mass of 1,000 cubic cm of water. The pound is defined as equal to 0.45359237 kg, exactly.