In 1931 built the first Transmisssion Electron Microscope, allowing structures of the cell to be seen for the first time.
A. Robert Hooke
B. Ernst Ruska
C. Anthony Van Leeuwenhoek
D. Louis Pasteur

Predict the results of a two base insertion or deletion in a strand of dna that codes for a protien, how does this differ from a three base insertion or deletion?

Acertain species of fish can have either long or short fins. the allele for long fins is dominant over the allele for short fins. a heterozygous, long-finned fish is crossed with a homozygous, short-finned fish. of the offspring, will have long fins and be , and will have short fins and be .

How does the nervous system affect the excretory system?