Which statement is not true of introduced species? a. introduced species may out-compete native species. b. an introduced species generally balance an ecosystem. c. an introduced species may take over an ecosystem. d. introduced species generally disturb natural food chains.

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?