A_1=25 \mathrm{~mm}^2, \quad A_2=50 \mathrm{~mm}^2, \quad L_1=3 \mathrm{~m}, \\ The researchers wish to increase the reliability of their experimental observations before investigating new claims that chemotherapy-resistant tumors are an example of continuing evolution. Which of the following statements includes a reasonable refinement that researchers could use in repeating the experiment? Mushrooms and potatoes are most closely related, since the node they share gave rise to all of the other organisms. These alleles code for glycoproteins that act as antigens on the red blood cells. D. The two populations will not show any differences because they originated from the same gene pool. E1=E2=200GPa,1=2=12106/CA1=25mm2,A2=50mm2,L1=3m,L2=5m,=1mm. A. At this same instant, the disk is spinning at a constant rate 2=4rad/s\omega_2=4 \mathrm{rad} / \mathrm{s}2=4rad/s, measured relative to the rod. A. Convergent evolution, because these organisms do not share a recent common ancestor. The species will undergo artificial selection, as the genes will adapt to warmer temperatures. A shift to less polluting fuel in the twentieth led to cleaner air and a lightening of the moth's normal habitat. Over time, populations A and B developed into two distinct species. D. A mixture of ribonucleotides such as adenine and uracil will spontaneously form single-stranded chains of RNA. Which of the following student claims is best supported by the data provided? This hypothesis states that the first genetic material was RNA, not DNA, and a transitional period led to the emergence of DNA as the storage molecule for genetic material. Some researchers claim that the decrease in plant species richness of this woodlot is unrelated to human activities over the last forty years. The woodlot environment is arid and species 1 and 2 are well-adapted to conserve water. Based on the data in Figure 1, which of the following would most affect the allelic frequencies of the populations on Isabela and Butuan? The second group is fed the same food without the mutagen. White circle, grey circle and black circle. A scientist believes that the first organic molecules may have come to Earth on meteorites 3.6 billion years ago. Populations M1 through M5 are located in Marion County. Based on the data in Table 1, which of the following best describes the relationship between the MC1R gene and coat color in the Carrizozo, New Mexico, rock pocket mouse population? Only males can inherit the color blindness condition. These building blocks combined to form polymers, such as crude proteins. C. Set up a new experiment in which these insects are sprayed with two different insecticides to see if they are more effective than Insecticides #1 and #2. D. Start each population with bacteria that differ from one another by a single mutation to ensure that the initial genetic variation in all populations is known. Which of the following statements best predicts the result of a comparison between the fossils found before and after the period of rapid change? Henslow's sparrow populations came to a peak in the mid1900s. The current global warming trend is placing new selective pressures on the species involved in these relationships. Continue treating the three insect populations with the same insecticides and determine whether their efficiencies decline significantly after several generations. In addition to the ABO blood groups, humans have an MN blood type system in which the M and N alleles are codominant to one another. Dr. Sidney Fox wished to add to the heterotroph hypothesis of the origin of life by synthesizing simple proteins from a mixture of amino acids.