All living things have the same pool of genes
_________ genes are on Earth today as compared to millions of years ago.
More
The same number of
We cannot tell how many
Many of the new genes produced are born from:
Mistakes
Cell divisions
Evolution
Mutations can have a bigger effect on new copies of genes by having the protein:
Do a different job altogether
Formed at a different time of life
All of the above
How may we have evolved to be able to smell more odors?
New smells have arisen that are necessary for us to recognize, so we have evolved the ability to smell them
The genes that produce proteins in our noses changed and are now made in a different organ; this became an advantage and allowed us to smell more smells
We have genes that code for proteins in our noses that grab odor molecules, and these genes mutated allowing the proteins to grab new molecules, allowing us to smell more smells
When a new protein arises, why is it selected by an organism?
Because it makes a organism healthier
Because it makes a organism better at the time of reproduction