During a period of time outside the host, a virus may become and lose many factors that are required for infections. these viruses stimulate the immune system with much lower mortality than the fully virulent strains.

The most famous fossil called archaeopteryx is which of the following? a dinosaur a fern a fish a bird

Which term specifically refers to an area of the body between a medial and lateral structure

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