What conditions make for a violent volcanic eruption?
a. magma that can flow easily
b. magma with low gas content
c. magma with low silica content
d. magma with high viscosity

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 .