Explain how the characteristics of bipedalism and opposable thumbs are advantageous to humans
What will be an ideal response?
Bipedalism frees the hands and forearms for carrying items, tools, food, and even children. Coupled with opposable thumbs, these features have undoubtedly contributed to better defense against predators, increased utilization of resources, and even advanced communication through gesturing and written symbols.
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Placing celery sticks in fresh water will make them more turgid and harder. This is because
A. the celery is hypotonic to fresh water. B. the celery is hypertonic to fresh water. C. the celery is isotonic to fresh water. D. water moves from the celery sticks into fresh water. E. salt moves from the water into the celery sticks.
What other information is related to the question?
What will be an ideal response?
Scientists have found that humans and yeasts
a. have similar genes for the assembly of certain proteins b. share all aspects of cellular structure c. have nothing in common d. cannot be evaluated for degree of relatedness
Which of the following is NOT true of cholera?
A) The causative agent lives naturally in marine water B) There is an effective vaccine for cholera C) Strain O1 El Tor has been responsible for several pandemics D) Rice-water stool is a symptom