Are humans responsible for neurotoxic shellfish poisoning? Why or why not? What will be an ideal response?
ANSWER: Indirectly, yes we are. Dinoflagellates will, under specific conditions, experience ‘algal
blooms' - explosive growths in population. One of the primary factors contributing to this is
the availability of nutrients which can be greatly increased by agricultural runoff (human
input). When the dinoflagellates are present in great numbers, filter-feeding shellfish
consume them in great quantity and absorb their toxins. These toxins then cause neurotoxic
shellfish poisoning in human consumers.
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The ________ model of population growth assumes that essential resources are unlimited and that the environment is constant
Fill in the blank(s) with correct word
The phenomenon known as chemotaxis is defined as
A) the squeezing of cells through the lining of capillaries. B) the release of prostaglandins and leukotrienes in response to microbes. C) the movement of a cell toward or away from a chemical stimulus. D) the coating of a pathogen by complement. E) an increase in allergies and helminth infection.
Butane and isobutane are isomers. This means they have the same:
A) number of carbon atoms but different numbers of hydrogen atoms. B) arrangement of atoms but a different chemical formula. C) chemical formula but can only exist as ring structures. D) chemical formula but a different arrangement of atoms.
Name the enzyme that synthesizes molecules of RNA complementary to the DNA sequence during transcription.
What will be an ideal response?