Summary for population size and structure

Which of the following types of rock would most likely contain a fossil? slate granite lava rock limestone

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

Does anyone know what the schooling version of sos mean? example