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 251 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?

Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.

Did you know?

People about to have surgery must tell their health care providers about all supplements they take.

Did you know?

The largest baby ever born weighed more than 23 pounds but died just 11 hours after his birth in 1879. The largest surviving baby was born in October 2009 in Sumatra, Indonesia, and weighed an astounding 19.2 pounds at birth.

Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Did you know?

Automated pill dispensing systems have alarms to alert patients when the correct dosing time has arrived. Most systems work with many varieties of medications, so patients who are taking a variety of drugs can still be in control of their dose regimen.

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
Variable Gases: Carbon Dioxide Variable Gases: Carbon Dioxide
A valve corroded by nitric acid. Hazardous materials releases are often caused by using incompatible ... A valve corroded by nitric acid. Hazardous materials releases are often caused by using incompatible ...
Carbon is constantly exchanged between large reservoirs in the lithosphere Carbon is constantly exchanged between large reservoirs in the lithosphere
Functional Groups of Carbon Functional Groups of Carbon
Energy flows from the environment into living organisms, then back to the environment Energy flows from the environment into living organisms, then back to the environment
Video: Role of ATP in muscle movement

For a complete list of videos, visit our video library