What is the evolutionary advantage of sexual reproduction?
What will be an ideal response?
Sexual reproduction allows for genetic recombination, possibly making the next generation more adapted to its environment. Genetic recombination is a major way to generate new genotypes, giving the environment something on which to act. Sexual reproduction originally evolved as a means to repair damaged DNA.
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Archaea have very diverse environmental requirements and tolerances. From what you have learned about them, which among the following conditions or substances do ALL archaeans require for survival and reproduction?
A. oxygen B. carbon C. moderate pH D. moderate temperature E. moderate salinity
Which of the following is not true of schistosomiasis?
A. Larvae called cercariae can penetrate intact skin through hair follicles. B. Freshwater snails are the intermediate host. C. Schisotosomiasis cases are beginning to appear in the southern U.S., as climate change brings warming waters to the region. D. Schistosomiasis covers its outer surface with blood proteins to escape detection by the immune system. E. Schistosomiasis is caused by blood flukes.
Explain an impact of human development on the water cycle
What will be an ideal response?
Fossil evidence shows that giraffes living 1000 years ago had much shorter necks than the giraffes seen today. Which
statement best explains this observation? a. The two groups of giraffes are not related. b. The two groups of giraffes arose as a result of convergent evolution. c. The difference in neck length is evidence for homoplastic inheritance. d. The two groups of giraffes were located in different geographical locations. e. The giraffes acquired longer necks through the continuing process of natural selection.