When two frog species, rana pipiens and rana sylvatica, mate, the offspring die early in embryonic development. this is an example of hybrid sterility mechanical isolation behavioral isolation hybrid inviability temporal isolation?

Are gametes exactly the same? explain why or why not?

Which type of neuron stimulates muscles to contract?

Urgent 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?