Why are most fossils of cnidarians coral fossils?

Chicken pox and hepatitis are bacterial diseases. true or false?

What was the purpose of mendel's experiments with dihybrid crosses? a. to determine if dna was a transforming factor b. to determine if traits could be recessive c. to determine if traits affected each other d. to determine if traits had more than one allele

Cells must be in osmotic equilibrium with their surroundings environments because if they swell or shrink thier membranes will rupture