Scientists develop a chemical that binds to molecules that make quorum sensing possible, rendering those molecules non-functional. If this chemical is incorporated into a mouthwash, how would it affect the community of bacteria that cause dental plaque?
A. Their negative effects would be reduced because they will no longer be able to produce mucilage and stick to teeth.
B. Their negative effects would be reduced because they will no longer be able to produce the acid that damages teeth.
C. Their negative effects would be increased because it will cause them to produce mucilage, allowing them to stick to teeth.
D. Their negative effects would be increased because it will cause them to produce the acid that damages teeth.
E. It would have no effect because they will still be able to form a biofilm and secrete the acid that damages teeth.
A. Their negative effects would be reduced because they will no longer be able to produce mucilage and stick to teeth.
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Which of the following best describes the link between population-limiting factors and K-selected species?
A. None of the answer choices is correct. B. K-selected species are limited by density-dependent factors and have few offspring. C. K-selected species are limited by density-dependent factors and have many offspring. D. K-selected species are limited by density-independent factors and have few offspring. E. K-selected species are limited by density-independent factors and have many offspring.
The green sulfur bacteria ________.
A. deposit granules of sulfur outside the cell B. deposit granules of sulfur within the cell C. do not deposit granules of sulfur D. deposit granules of sulfur within and outside the cell
Lichens are adversely affected by
A. sunlight. B. humidity. C. sexual reproduction of the fungal partner. D. asexual reproduction of the photosynthetic partner. E. pollution.
In humans, the sex of an offspring is determined solely by the chromosomes donated by the male parent
Answer the following statement(s) true (T) or false (F)