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.
Answer:
A) the origin of eukaryotes
Explanation:
The Endosymbiotic theory talks about how the ancestors of modern eukaryotic cells were once 2+ prokaryotic cells. This theory says that one prokaryotic cell basically lived inside another prokaryotic cell and these cells formed a long term relationship. The prokaryotic cell eventually became a permanent part of the host and eventually evolved into modern day eukaryotic cells.
Answer: Plants do both photosynthesis and cellular respiration.
Explanation:
All cells do cellular respiration even without light.
Honestly, photosynthesis alone would be right since the teacher didnt state the questions correctly. But you should choose both cause in the light it does both.
Answer:
Fur colour can be represented by both the dominant and the recessive alleles of the gene encoding the fur color.
Explanation:
- Considering that the fur colour trait follows Mendelian laws of inheritance.
- The dominant allele can express itself in both the homozygous and heterozygous condition.
- The recessive allele can represent itself only in the homozygous condition.
- Therefore, there will be two phenotypes, one will be represented by both the homozygous dominant and heterozygous dominant genotypes and the other represented by the homozygous recessive genotype.
- Considering that the fur colour trait does not follows Mendelian laws of inheritance (Incomplete Dominance or Codominance).
- In Incomplete dominance, three phenotypes are observed, for each of homozygous dominant, heterozygous dominant and homozygous recessive genotypes respectively.
- In Codominance, phenotypes of both the dominant and recessive genotype is shown in the same individual.
If you are speaking of genetics, the only real similarity between the two is that they are terms used to describe alleles that are found on a particular gene. If you have homozygous alleles, then both of them are the same. If you have heterozygous alleles, then the two of them are different. In the case of sex chromosomes, females are homozygous, having XX while males are heterozygous, having XY.