What is the difference between compact and trabecular bone

Vessels draining the myocardium of the heart, open primarily ,into which chamber?

In guinea pigs, black fur (b) is dominant over white fur (b). cross a heterozygous (hybrid) black guinea pig with a homozygous (purebred) white guinea pig. complete a punnett square, identify the genotype(s), phenotype(s), and probability (% and fraction) that the offspring will be black and white?

Write a hypothesis regarding mechanical and chemical weathering. will one create stronger results than the other? will they be equal?