Diseases such as malaria, dengue fever, and Chagas disease may be spread by any blood-sucking arthropod.
Answer the following statement true (T) or false (F)
False
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The hard mineral defense of silica plates found in some grasses is effective because:
A. silica does not taste good, so herbivores don't feed on the grass that contains it. B. silica is abrasive and it wears down insect mouth parts, so insects feed less efficiently and more slowly. C. silica is a chemical defense that is toxic to most herbivores. D. silica is able to be consumed by herbivores and used to deter their predators. E. silica binds to proteins and prevents their uptake from the guts of herbivores.
The primary drug of choice for infections caused by S. maltophilia is:
a. a <-lactam agent in combination with an aminoglycoside antibiotic. b. trimethoprim-sulfamethoxazole. c. ticarcillin and clavulanic acid. d. chloramphenicol.
Which of the following is the correct order of plant evolutionary appearance (geologically oldest to present date)?
A) angiosperms, gymnosperms, psilopsids, pteriodophytes B) gymnosperms, angiosperms, psilopsids, pteriodophytes C) psilopsids, pteriodophytes, gymnosperms, angiosperms D) pteriodophytes, gymnosperms, angiosperms, psilopsids
The ability of a lens to gather light is referred to as its
A) resolution. B) numerical aperture. C) refraction. D) contrast. E) magnification.