Hemophilia is an X-linked recessive disorder (Xh) that is passed through generations and can be traced by using a pedigree. John is an empty square with a x Upper H Y genotype. Based on the pedigree that is shown, which describes John? carrier for hemophilia expresses hemophilia does not have hemophilia expresses hemophilia and died of complications

clumped distribution, because you'de have all of the population gathered in a relatively small are.

it's the most common because it provides protection and a mate for reproduction

example: humans, seeweed, cattles, etc.

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".