Which key resources are impacted the most by rapidly growing population

Guinea pig coat color is determined by a single gene. the allele for black coat color is dominant to brown. in a cross between twoblack-haired guinea pigs, 20 offspring are born. if both parents were heterozygous, probability would predict that approximately howmany of the 20 offspring would have brown hair?

How do living things obtain phosphorus

Has regulatory areas for thirst, hunger, body temperature, water balance, and blood pressure