Insecticides and herbicides are the most commonly used pesticides. Brainstorm some of the characteristics that make insects and weeds such serious competitors.

Describe how some populations of pests become resistant to pesticides.

Over many generations, certain insect species have become more and more resistant to insecticides. What type of natural selection is this an example of, and how does it differ from the other types?

Simplify meiosis into its basic events.

Effect of Rotenone and Antimycin A on Electron Transfer

Rotenone, a toxic natural product from plants, strongly inhibits NADH dehydrogenase of insect and fish mitochondria. Antimycin A, a toxic antibiotic, strongly inhibits the oxidation of ubiquinol.

(a) Explain why rotenone ingestion is lethal to some insect and fish species.

(b) Explain why antimycin A is a poison.

(c) Given that rotenone and antimycin A are equally effective in blocking their respective sites in the electron-transfer chain, which would be a more potent poison? Explain.

Explain how repeated insecticide applications act as a selective agent for evolutionary change in insect populations:

Ms. J., 48 years old, was identified as having essential hypertension four years ago. Since she has been feeling good for the past six months, she has stopped taking her medicine. She recently started a new job and has been too busy to enjoy her typical golfing and swimming. She has made the decision to get a checkup since, in addition to feeling exhausted and dyspneic, she has recently experienced a number of episodes of vertigo, blurred vision, and epistaxis (nosebleeds). Upon inspection, it is discovered that she has a blood pressure of 190/120, some lung rales, some sclerosis, and many arteriolar ruptures on the retinas of her eyes. The doctor prescribes rest, blood pressure medication, a dietician appointment, urinary tests to monitor kidney function, and prescription medicine to decrease blood pressure. Explain the pathogenesis of primary hypertension.

In biological systems, an important enzyme involved in the regulation of redox reactions is ______.

Ms. J., 48 years old, was identified as having essential hypertension four years ago. Since she has been feeling good for the past six months, she has stopped taking her medicine. She recently started a new job and has been too busy to enjoy her typical golfing and swimming. She has made the decision to get a checkup since, in addition to feeling exhausted and dyspneic, she has recently experienced a number of episodes of vertigo, blurred vision, and epistaxis (nosebleeds). Upon inspection, it is discovered that she has a blood pressure of 190/120, some lung rales, some sclerosis, and many arteriolar ruptures on the retinas of her eyes. The doctor prescribes rest, blood pressure medication, a dietician appointment, urinary tests to monitor kidney function, and prescription medicine to decrease blood pressure. Identify and describe the effects of two drugs that are effective in the treatment of hypertension.

What measures can be taken to help reduce the blood pressure of a patient with chronic hypertension and high blood pressure?

Describe the role of the kidneys, lungs, and endocrine glands in regulating the body’s fluid composition and volume.

Determine $f_{x}$ and $f_{y}$.

$$f(x, y)=\sin ^{-1}(x y)$$

Find the domain of each function. $g ( x ) = \frac { 1 } { x ^ { 2 } + 1 }$

Inflation is a term used to describe the erosion of the purchasing power of money. For example, if the annual inflation rate is 3%, then $1000 worth of purchasing power now will have only$970 worth of purchasing power in 1 year because 3% of the original $1000$(0.03 \times 1000=30)$has been eroded due to inflation. In general, if the rate of inflation averages r per annum over n years, the amount A that$P will purchase after n years is $A=P \cdot(1-r)^{n}$ where r is expressed as a decimal. If the inflation rate averages 2%, how much will $1000 purchase in 3 years?