A researcher wants to determine if ponds and lakes downwind of a coal-burning power plant are affected by the plant’s emissions. The best parameter from the water in the ponds and lakes to measure in order to determine the effect of the plant’s emissions on the aquatic ecosystems is
<u>A) pH</u>
Explanation:
- PH stands for Potential of Hydrogen. It refers to the hydrogen ion concentration in a solution.
- The majority of aquatic creatures prefer a pH range of 6.5-9.0, though some can live in water with pH levels outside of this range. Aquatic pH levels. The optimum pH levels for fish are from 6.5 to 9.0. Outside of optimum ranges, organisms can become stressed or die.
- It is the measure of the acidity or alkalinity of a solution. The PH value ranges from 0 to 14 on a pH scale.
- pH can be measured by measuring the voltage produced between two special electrodes immersed in the liquid solution. One electrode, made of a special glass, is called the measurement electrode.
- PH is zero that means hydronium ion concentration is zero and pH is 14 that means hydronium ion concentration is 1.
- Acids and bases have various strengths, all depending on their pH . An extremely strong base would be more dangerous than a weak acid, and vice versa.
In excreted urine, a reliable "marker" that a pregnancy has initiated is human chorionic gonadotropin (hCG).
<h3>
What is human chorionic gonadotropin?</h3>
- The trophoblast cells that surround a developing embryo.
- Eventually give rise to the placenta after implantation generate the hormone known as human chorionic gonadotropin, which helps women recognize pregnancy.
- Some pregnancy tests can detect the HCG's presence.
- The placenta secretes a hormone known as human chorionic gonadotropin throughout pregnancy (HCG).
- It tells the body to stop menstruation and makes the uterine lining thicker to support an embryo in development.
- After fertilization, HCG levels increase and stay elevated for another 10 weeks or more of pregnancy.
- As accurate as blood tests are urine testing.
- An individual is pregnant if their HCG level is high.
- An individual is not pregnant if a qualitative HCG test is negative.
- After a few days, a person should repeat the test if they still believe they are pregnant.
Learn more about human chorionic gonadotropin here:
brainly.com/question/28025179
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Answer:
The correct answer is - option D.
Explanation:
Patent is the authority or licence that is provide by the government to protect the rights of an inventor's invent and prevent others to making, creating, selling and using without the permission of the inventor.
It is used to provide property rights to a specific inventor for his discoveries and inventions. Patent can be for the limited time so one can not copy for the limited period of time or complete patent.
Thus, the correct answer is option D.
The answer is D! birds have to migrate for winter to find an abundance of food! they learned this over time making it a learned adaptation