Coat color in cats is determined by genes at several different loci. At one locus on the X chromosome, the X+ allele codes for black fur, where the Xo allele encodes orange fur. Females can be black (X+X+), orange (XoXo) or tortoiseshell (a mixture of orange and black; X+Xo). Males are either black (X+Y) or orange (XoY). If a tortoiseshell female gives birth gives to one orange male, one black male, two tortoiseshell females, and one orange female, what is the genotype of the cat with which it was mated?

Examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. polyploidy is creating new species. the two populations are not interbreeding freely. hybrid offspring of the two populations begin to appear. one species will increase into a population size twice as large as the other species.

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.

Hemoglobin is a proton that carries oxygen around the body what is hemoglobin made from