This was a hard one but I did some research and I found this
Our genome has 3 billion base pairs so a naive calculation shows 3x10^36 different combinations. But that's a meaningless number. A lot of those variants would be silent mutations, i.e. changes in introns, repeated sequences, 3rd position codons, etc etc that would have no effect on the phenotype.
Hope this help
Answer:
Option A) Simple Prokaryotes.
Explanation:
- The first life that existed on Earth was the single-celled microbes who lack a well defined nucleus and are known as Prokaryotes
- They existed on Earth for almost four billion years ago.
- In Prokaryotes "Pro" means before and "Karyon" means nucleus which means they lacked nucleus and many other cell organelles that complex structures have.
- They are single celled organism adaptive of living in earth older environment.
Result: Simple Prokaryotes was the first life on earth.
Answer:b)lubricating surfaces
Explanation:took it on edge hope this helped
X-linked recessive traits are more common in males because the decease is only carried on the X chromosome therefore females need two copies of the gene to have the decease whereas in males they only need one copy. This is because males are XY and females are XX
