contains secretory glands that release enzymes
What will be an ideal response?
mucosa
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Why are modern Africans more genetically diverse than people of other regions?
What will be an ideal response?
Which type of fossil is considered a trace fossil?
a. footprint b. shell c. seeds d. teeth e. spores
Which of the following statements is false?
a. The best option for a vaccine against AIDS may be an engineered virus. b. HIV genes mutate faster than the immune system can form antibodies against their products. c. Home test kits are as accurate as those used in clinics d. It is very difficult to form a vaccine against all the mutated forms of HIV. e. The prevention of the spread of HIV currently depends upon implementing behavioral controls through education.
Which statement best describes the effect on the body due to pH changes either above or below the normal range?
A) pH ranges vary throughout the body; therefore, blood pH has no detrimental effects on the body as it changes pH. B) Changes in pH can denature proteins that serve as enzymes and receptors throughout the body, resulting in widespread effects on the body. C) Changes in pH destroy the nephrons of the kidney, making kidney failure is inevitable. D) Changes in pH can only lower pH causing acidosis, meaning organs deteriorate due to high levels of acid. E) Changes in pH out of the normal range are normal and will not have any detrimental effects on the body.