Answer the following question given this paragraph: Excretion is the process of removing wastes from the body. Q: Name the process of removing wastes from the body. Choices: - filtration - depletion - degradation - excretion A:
excretion
Answer the following question given this paragraph: Q: Oscillations in the transcription of certain genes are at the heart of the molecular mechanisms underlying what biological rhythms? Choices: - metastasis rhythms - brain rhythms - reproductive rhythms - circadian rhythms A:
circadian rhythms
Q: Answer the following question given this paragraph: Further away from the heart, the aorta branches into smaller arteries, which eventually branch into capillaries. Capillaries are the smallest type of blood vessel; they connect very small arteries and veins. Gases and other substances are exchanged between cells and the blood across the very thin walls of capillaries. Q: What are the smallest type of blood vessel? Choices: - varicose veins - spider veins - arteries - capillaries A:
A: capillaries
Question: Answer the following question given this paragraph: Ureters The kidneys and ureters are completely retroperitoneal, and the bladder has a peritoneal covering only over the dome. As urine is formed, it drains into the calyces of the kidney, which merge to form the funnel-shaped renal pelvis in the hilum of each kidney. The hilum narrows to become the ureter of each kidney. As urine passes through the ureter, it does not passively drain into the bladder but rather is propelled by waves of peristalsis. As the ureters enter the pelvis, they sweep laterally, hugging the pelvic walls. As they approach the bladder, they turn medially and pierce the bladder wall obliquely. This is important because it creates an one-way valve (a physiological sphincter rather than an anatomical sphincter) that allows urine into the bladder but prevents reflux of urine from the bladder back into the ureter. Children born lacking this oblique course of the ureter through the bladder wall are susceptible to "vesicoureteral reflux," which dramatically increases their risk of serious UTI. Pregnancy also increases the likelihood of reflux and UTI. The ureters are approximately 30 cm long. The inner mucosa is lined with transitional epithelium (Figure 25.6) and scattered goblet cells that secrete protective mucus. The muscular layer of the ureter consists of longitudinal and circular smooth muscles that create the peristaltic contractions to move the urine into the bladder without the aid of gravity. Finally, a loose adventitial layer composed of collagen and fat anchors the ureters between the parietal peritoneum and the posterior abdominal wall. Q: What structures sweep laterally, hugging the pelvic walls, then turn medially and pierce the bladder wall obliquely? Choices: - tubules - fallopian tube - catheters - ureters A:
Answer: ureters
*Question*
Answer the following question given this paragraph: The theory of evolution by natural selection explains how populations of organisms can change over time. As environments change, so must the traits of organisms if they are to survive in the new conditions. Evolution by natural selection explains how this happens. It also explains why there are so many different species of organisms on Earth today. You can see examples of the incredible diversity of living animals in Figure below . You can read more about the theory of evolution in the chapter Evolution. Q: Which theory explains how populations of organisms can change over time? Choices: - free by natural selection - changes by natural selection - intelligent selection - evolution by natural selection A:
**Answer**
evolution by natural selection
(Q).
Answer the following question given this paragraph: People build dams and levees to protect from flooding. In an emergency, sandbags can be put out. Q: Why do people build dams and levees? Choices: - to horde the water - increase flooding - store drinking water - prevent flooding A:
(A).
prevent flooding