Answer: Polychlorinated biphenyls (PCBs) are a group of manmade chemicals. They are oily liquids or solids, clear to yellow in color, with no smell or taste. PCBs are very stable mixtures that are resistant to extreme temperature and pressure. PCBs were used widely in electrical equipment like capacitors and transformers. They also were used in hydraulic fluids, heat transfer fluids, lubricants, and plasticizers. The primary company that made PCBs in the United States was Monsanto Inc., mainly using the name Aroclor. Commercial production of PCBs ended in 1977 because of health effects associated with exposure. In 1979, the U.S. Environmental Protection Agency (USEPA) banned the use of PCBs; however, PCBs are still present in many pre-1979 products.
Answer:
Option-A
Explanation:
The American College of Sports Medicine (ACSM) now does not create the physical guidelines of their own instead produces the guidelines produced by the Physical Activity Guidelines for Americans.
The guidelines are different for different age groups and for the adults which is the group which likes doing physical training, the guidelines suggest that a person should do either 2.30 hours to 5 hours of the moderate exercise per week or 75 minutes to 150 minutes vigorous exercise per week.
In the given question, the most suitable option which follows the guideline of the ACSM is option-A.
Thus, Option-A is the correct answer.
I believe that the best answer among the choices provided by the question is <span>D) A study by Dr. Birde showed that the number of songbirds in her yard increased due to a modified food source.</span>
Hope my answer would be a great help for you. If you have more questions feel free to ask here at Brainly.
In any population, members have slight differences among them, whether in height, eyesight acuity, beak shape, rate of egg production, or other traits that may affect survival and reproduction. If a trait has a genetic basis, it can be passed on to offspring helping the terms of natural selection.
Answer:
- Half (8/16) of the offspring will have gray fur and black eyes.
- Half (8/16) of the offspring will have gray fur and red eyes.
- None (0/16) of the offspring will have white fur.
Explanation:
For the purposes of this question, we will assume the following notation for the involved alleles:
G: gray fur (dominant), g: white fur (recessive).
B: black eyes (dominant), b: red eyes (recessive).
A GGbb rabbit may only produce one type of gametes, namely Gb.
A ggBb rabbit may produce either gB or gb gametes.
Since not all theoretical combinations are present, the resulting Punnett square may be simplified as follows:
| Gb
——-+-————
gB | GgBb
——-+-————
gb | Ggbb
As seen above, 100% of the offspring will have a Gg genotype (resulting in gray fur). As for eye color, half of them will have a Bb genotype (resulting in black eyes) whereas the other half will have a bb genotype (red eyes).