HDWK Activity Chapter 9 Fig. 9.6 | Latest Version | 2024/2025 | Graded A+

HDWK Activity Chapter 9 Fig. 9.6 | Latest Version | 2024/2025 | Graded A+ **Why did Kohler and Lipton begin by replicating a previous experiment?** **To confirm the reliability and reproducibility of the initial findings.** **In a subsequent experiment, researchers divided platelet proteins from rat blood into six fractions (A, B, C, D, E, F) and accidentally combined some fractions during application to rat fibroblasts. What did they observe regarding cell growth rates?** **They observed increased growth rates with combined fractions ABE, BCE, and ABF, decreased growth rates with ACD and DEF, and no change with ACE, CEF, and ACF treatments.** **How did Kohler and Lipton measure the rate of cell division in cultured mouse fibroblasts?** **They likely measured cell division rates using techniques such as cell counting or fluorescence-based assays.** **What distinguishes blood serum from blood plasma?** **Blood serum is plasma without clotting factors, whereas blood plasma includes clotting factors.** **When blood is drawn from the body, it clots. To prevent clotting, researchers can remove platelets and cells from the blood and treat it with anti-clotting agents. What is produced by this treatment?** **This treatment produces blood plasma, which is the liquid component of blood after removing cells and clotting factors.** **In Experiment 1, what would have been a suitable negative control?** **Cells grown without any added blood products.** **In Experiment 2, what would have been a suitable negative control?** **Cells grown without any added blood products.** **Which statement accurately describes the graph in Experiment 1?** **Cells cultured in blood serum initially divide rapidly, followed by a slowdown in division rate over time.** **Which statement accurately describes the