PLEASE HELP 40 POINT. Woolly mammoths became extinct around 10,000 million years ago. A recent study conducted by scientists found that the last generations of woolly mammoths were plagued by harmful gene mutations. Some of the mutations caused them to have softer fur that didn’t protect them from the cold, a diminished sense of smell, and digestive problems. A species potential for evolution is based on four factors: the potential for a species to increase in number the heritable genetic variation of individuals in a species due to mutation and sexual reproduction organisms competing for limited resources such as food or water in their environment the proliferation of those organisms that are better able to survive and reproduce in the environment In two to three paragraphs, explain why the last generations of woolly mammoths couldn’t meet these factors to evolve in a changing environment. Also explain how data such as the fossil record and DNA evidence can identify the factors that can lead to the evolution of a species.

In a hypothetical breed of dogs, coat color is controlled by two genes. there are six different coat colors in this breed: black, brown, cream, gray, silver, and tan. consider the following crosses.cross 1: black females from a lineage of all black dogs are crossed with brown males from a lineage of all brown dogs. f1 males and females are all black. when f1 are intercrossed, f2 males and females are black or brown.cross 2: black females from a lineage of all black dogs are crossed with tan males from a lineage where all males are tan and all females are cream. f1 males are black, f1 females are gray. when f1 are intercrossed, f2 males and females are black, brown, gray, or tan.cross 3: silver females from a lineage where all females are silver and all males are gray are crossed with brown males from a lineage of all brown dogs. f1 males and females are all gray. when f1 are intercrossed, f2 males are black, brown, gray, or tan, f2 females are cream, gray, silver, or tan.select the correct statements regarding the mode of inheritance of the coat color genes.a) both genes are x-linked.b) both genes are autosomal.c) one of the genes modifies the expression of the other gene.d) each gene has an additive effect on the intensity of coat color.e) each gene independently specifies three colors.f) one of the genes is autosomal, and the other is x-linked.

Indicate whether the following statements about the biases in the fossil record are true or false. a) inland species are more likely to be preserved than marine species b) organisms with hard body parts are more likely to be preserved than are those composed soft tissues. c) species that existed over a larger area are more likely to be preserved than species existing over a smaller area. d) organisms that lived very long ago are more likely to be found as fossils than organisms that lived relatively recently e) the fossils of larger organisms are more likely to be found than the fossils of smaller organisms

92 sathe best for the question 11. most animals and plants reproduce sexually. this means that dna is passed down to new organisms from two parental organisms. which of the following is a key advantage of sexual reproduction?