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QUESTION GUIDE EXIT TE
irsevering Plants
10. Use "Nature's Cures for Building" to answer questions 6-10.
What is the best summary of the article?
Read the next two selections. Then choose the best answer to each question,
Concrete is a popular material, but it can develop cracks over
time, Microbiologist Hendrik Jonkers believes that adding
bacteria to concrete can help remedy this problem and
provide savings for the construction industry.
Plants That Beat the Odds
A Dutch microbiologist named Hendrik Jonkers became
interested in investigating how bacteria might be applied to
concrete to fill cracks in concrete caused by water. He
developed a self-healing bioconcrete that works to make
concrete more durable.
1 Yellowstone National Park extends across a unique area of land in Wyoming,
Montana, and Idaho. Thousands of geothermal vents that lie just below the earth's
surface cover this vast region. Geothermal vents are deep holes in the ground that
release built-up pressure in the form of steam and scalding hot water. The temperature
of the ground near these hot spots can rise to more than 150 degrees Fahrenheit.
During a trip to Yellowstone, microbiologist Rusty Rodriguez noticed something
peculiar. He observed many plants thriving in the searing soil despite these intense
Andrinne Ondrisse winderorthwthoconlonte were shorn Hurich in cuch otromo
Hendrik Jonkers, a Dutch microbiologist, noticed that
concrete cracks over time. He decided to add bacteria to
concrete to make a substance called bioconcrete. The
bacteria are placed inside plastic capsules that are mixed into
wet concrete
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