Study this image of a geologic time scale
How long ago did invertebrates become common on Earth
ERA
PERIOD
MILLIONS OF
YEARS AGO
KEY EVENTS
Humans evolve
Qualorary
Torta
1.6 million years ago
132 million years ago
410 million years ago
520 million years ago
Cretace
Extinction of
Ons
TE
Para
Carbon
con
Invers
become common
Errente

In cattle a single gene with two alleles determines fur color the fur can be red white or roan roan fur has both red and white hair which of the following statements is true a the allele for roan fur color is dominant over red and white fur color b the allele for red fur color is dominant over white and roan fur color c the roan and white alleles are expressed independently of the other d the red and white alleles are expressed independently of each other