This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Carbon-14 dating is fairly reliable for dating once-living materials that died up to ________. A) ... (Read 162 times)

bb

  • Hero Member
  • *****
  • Posts: 544
on: Aug 27, 2018
Carbon-14 dating is fairly reliable for dating once-living materials that died up to ________.
 
  A) 5000 years ago
  B) 50,00 years ago
  C) 250.000 years ago
  D) 2.5 million years ago

Question 2

Why is it easier for the body to excrete a polar molecule than it is to excrete a nonpolar molecule? What chemistry does the body use to get rid of molecules it no longer needs?
 
  A) It is easier for the body to excrete non-polar molecules because they dissolve in the oils of the skin and are washed away when we bathe.
  B) Polar molecules are easier to excrete because of their greater solubility in water. Upon dissolving in water, they can be excreted through urine.
  C) Polarity of the molecules has nothing to do with the ease of excretion. However, the body does metabolize and excrete smaller molecules more easily and passes them out through the colon.
  D) Polar and non-polar molecules are excreted equally easily. The body is well adapted to deal with both forms of molecules via its metabolic processes.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

carlsona147

  • Sr. Member
  • ****
  • Posts: 341
Reply #1 on: Aug 27, 2018
Answer to Question 1

B

Answer to Question 2

B


bb

  • Hero Member
  • *****
  • Posts: 544
Reply #2 on: Aug 27, 2018
TY


carlsona147

  • Sr. Member
  • ****
  • Posts: 341
Reply #3 on: Aug 27, 2018
You're welcome


« previous next »
 

Did you know?

Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.

Did you know?

Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.

Did you know?

There are approximately 3 million unintended pregnancies in the United States each year.

Did you know?

Though Candida and Aspergillus species are the most common fungal pathogens causing invasive fungal disease in the immunocompromised, infections due to previously uncommon hyaline and dematiaceous filamentous fungi are occurring more often today. Rare fungal infections, once accurately diagnosed, may require surgical debridement, immunotherapy, and newer antifungals used singly or in combination with older antifungals, on a case-by-case basis.

Did you know?

Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

Photograph of an occupational therapist assisting a patient with learning independence in activities Photograph of an occupational therapist assisting a patient with learning independence in activities
Non-Carbon Organic Molecules? Non-Carbon Organic Molecules?
Living systems such as the human body consist of closely interrelated elements Living systems such as the human body consist of closely interrelated elements
Carbon dioxide. This molecule exhibits a nonpolar bond and results in a linear and symmetrical ... Carbon dioxide. This molecule exhibits a nonpolar bond and results in a linear and symmetrical ...
Taxonomy of all living things Taxonomy of all living things
In the reaction C(s) + O2(g) CO2(g) carbon is __________. In the reaction C(s) + O2(g) CO2(g) carbon is __________.
Video: Griffith's experiments

For a complete list of videos, visit our video library