What are some of the dangers associated with the use of organophosphate pesticides that might be of concern for humans? (Organophosphates inhibit acetylcholinesterase.) What are some ethical concerns related to their use?
What will be an ideal response?
There are many insecticides that prevent insect pests from damaging favorable plants or household foods. The organophosphate insecticides kill insects by inhibiting acetylcholinesterase, the enzyme that degrades acetylcholine. This causes acetylcholine to accumulate and continuously stimulate in the synapse. These pesticides have a similar effect on humans.
The following are some of the ethical concerns: (1 ) Organophosphates could be used against humans in warfare. (2 ) Organophosphates could pose a threat to wildlife, including "good" insects such as bees, if not applied carefully. (3 ) These toxins could be used in homicides and suicides. (4 ) Accidental poisoning of farm workers and others exposed to these pesticides kills 500,000 people annually worldwide.
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In 95% of cases of Down's syndrome, there is one extra chromosome (number 21) in every cell. This aneuploid condition is most likely the result of
A. failure to suppress DNA replication between meiosis I and meiosis II. B. failure of the chromosomes to assort independently during meiosis. C. failure of 1 homologous pair to segregate during meiosis. D. failure of 2 homologous pairs to segregate during meiosis. E. failure of the cytoplasm to divide at the end of meiosis II. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you know about meiosis? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Lymphocytes are the cells primarily responsible for the adaptive immune responses
Indicate whether this statement is true or false.
Which of the following is a way prokaryotic DNA can be altered by bacteriophages?
a. through binary fission b. through mitosis c. through conjugation d. through transduction
Which of the following was NOT part of the Earth’s primitive atmosphere?
a. oxygen b. nitrogen c. hydrogen d. water vapor e. inert gases