When solid surfaces rub against each other, the kind of friction that occurs is called
A. Static Friction
B. Surface Friction
C. Sliding Friction
D. Rolling Friction

Witch type of microscope is used to view very small cell components like proteins and dna?

What molecules will be best used to compare different species with the exact same sequence of amino acids? why would two species have the same protein even if the molecules in question is different? (hint: transcription to translation to protein).

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