Aug is a start codon, gau codes for aspartic acid, and ggu codes for glycine. this is true for the simplest bacteria, the amoeba,
and multicellular plants. what description best explains this phenomenon?
the genetic code is universal and suggests common ancestry across all
groups of life
the genetic code has similar features across most domains of life, with
substantial differences as well
the genetic code is only similar for these three codons, but other codons
will result in different amino acids.
the genetic code is the same for these three species due to convergent
evolution but does not indicate common ancestry.

The genetic code is universal and suggests common ancestry across all

groups of life

Explanation:

The genetic code for all organisms is virtually identical with very little changes over the many years since the evolution of first primitive organisms. This means that the same codons (3 nucleotide sequence) that code for particular amino acids in multicellular plants code the same in bacteria and amoeba.  This means this code is highly  conserved and that all species of organisms had a common ancestry from millions of years ago.

a, i am pretty sure.

1: most common garden plants prefer loam — soils with a balance of different-sized mineral particles (approximately 40% sand, 40% silt, and 20% clay) with ample organic matter and pore space. however, some plants grow better in sandy soils, while others are well-adapted to clay soils.

2: available water capacity is the maximum amount of plant available water a soil can provide. it is an indicator of a soil's ability to retain water and make it sufficiently available for plant use. available water capacity is the water held in soil between its field capacity and permanent wilting point.

3: it is the same for all living things (plants and animals). it also includes very tiny organisms that our eyes cannot see. they are known as microorganisms, and include viruses, bacteria and fungi.