In a comparison of Homo erectus, archaic Homo sapiens, and modern Homo sapiens, the general trend in robusticity over time in Homo can be characterized as ____. a.) increasing over time slightly until 100,000 years ago, then significant increase b.) no real change in robusticity is detected over time c.) decreasing significantly over time d.) decreasing slightly over time until 100,000 years ago followed by a dramatic decrease

)Approximately how far back in time does the fossil record extend? 3.5 million years 5.0 million years 3.5 billion years 5.0 billion years -) How could the duplication of the Hox gene complex help facilitate animal adaptive radiation? The new gene copies helped facilitate the evolution of more complex body plans. The new gene copies helped facilitate the evolution of smaller bodies. The new gene copies led to lower metabolic rates. It is unlikely that gene duplication events in the Hox complex played a role in the adaptive radiation animals. ) Whatever its ultimate cause(s), the Cambrian explosion is a prime example of mass extinction evolutionary stasis adaptive radiation a large meteor impact

Contrast between organic evolution vs cultural evolution with respect to the following: a) what is changing over time (be specific) b) what is the relative rate of the change (very fast, very slow or somewhere in between. (Note: the question is not asking you to explain organic evolution and cultural evolution.)

Based on the biological species concept, which of the following would lead biologists to conclude that different populations of lizards were actually a single species rather than two different species? A.) lizards from the two different populations mate rarely, and produce hyrbid offspring that are sterile B.) Lizards from the two differnt populations mate during different seasons  C.) Lizards from the two different populations mate regularly and produce sterile offspring D.) Lizards from the two different populations matre regularly and produce viable offspring capable of reprod

Suppose you have four species of lizard and you are interested in how leg length will change in a single generation of evolution under directional selection. Given the following parameters, which lizard do you predict will change the most in one generation? Species A: Heritability: 0.5, selection differential: 1.2 Species B: Heritability: 0.4, selection differential: -1.9 Species C: Heritability: 0.9, selection differential: -0.67 Species D: Heritability: 0.1, selection differential 3.2 Species A Species B Species C Species D

1) Describe the issues raised by the discoveries of Homo naledi and Homo floresiensis in understanding the story of the evolution of Homo sapiens?   Please  Answer  correctly & with detailed step-by-step explanation needed...    Please i need unique definitions   ADD CONCLUSION AT END.... THANKS

A number of comparisons of nucleotide sequences among hominidsand rodents indicate that inbreeding may have occurredmore often in hominid than in rodent ancestry. Bakewell et al.(2007. Proc. Nat. Acad. Sci. [USA] 104: 7489-7494) suggest thatan ancient population bottleneck that left approximately 10,000 humans might have caused early humans to have a greaterchance of genetic disease. Why would a population bottleneckinfluence the frequency of genetic disease?

Long bearded macaques are a (hypothetical) species of monkey who grow long white hair on their faces. A team of scientists studying a population of long bearded macaques notices that males with longer hair get more opportunities to mate and father more offspring. They hypothesize that long hair is adaptive in male monkeys. How should they test their hypothesis? a. Look for evidence of hair in the ancestors of macaques. b. Determine whether macaque hair length is heritable. c. Test if other traits in male macaques are also adaptive d. Test if male macaques who have had their faces shaved are still able to mate.* O e. Measure hair length of female macaques.

Which of the following are INCORRECT about inbreeding?   select all that apply a.) It speeds evolutionary change b.)It causes evolution c.)Allele frequency changes d.)Genotype frequency does not change e.)Heterozygosity decreases

a) What is the best estimate (mean age), in millions of years, for the divergence of the clade containing the American Giant Short Faced Bear from the clade containing the Sloth Bear? b) According to Figure 1, bears as a group experienced substantial evolutionary radiation near what geological boundary? c) True or False. An entire clade of bears has gone extinct because the two extinct bear species in the figure are sister species. d) What bears are the nearest relatives of the Sun Bear?