« previous next »

Author Question: About 25 of the 92 natural elements are known to be essential to life. Which fou (Read 1159 times)

Hawke

  • Hero Member
  • *****
  • Posts: 679
on: May 25, 2013
About 25 of the 92 natural elements are known to be essential to life. Which four of these 25 elements make up approximately 96% of living matter?
A) carbon, sodium, hydrogen, nitrogen
B) carbon, oxygen, phosphorus, hydrogen
C) oxygen, hydrogen, calcium, nitrogen
D) carbon, hydrogen, nitrogen, oxygen
E) carbon, oxygen, nitrogen, calcium


Melanie

  • Full Member
  • ***
  • Posts: 204
Reply #1 on: May 28, 2013
Quote from: Hawke on May 25, 2013
D) carbon, hydrogen, nitrogen, oxygen


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

Hawke

  • Hero Member
  • *****
  • Posts: 679
Reply #2 on: Jun 10, 2013
Thanks


« previous next »
 

Did you know?

Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

Did you know?

Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.

Did you know?

The training of an anesthesiologist typically requires four years of college, 4 years of medical school, 1 year of internship, and 3 years of residency.

Did you know?

According to animal studies, the typical American diet is damaging to the liver and may result in allergies, low energy, digestive problems, and a lack of ability to detoxify harmful substances.

Did you know?

The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

Transposable elements Transposable elements
Life cycle of norepinephrine (NE): (1) NE is synthesized from the amino acid tyrosine; (2) NE is ... Life cycle of norepinephrine (NE): (1) NE is synthesized from the amino acid tyrosine; (2) NE is ...
How to setup and solve a half-life problem using a table of values (Question 1) How to setup and solve a half-life problem using a table of values (Question 1)
Life cycle of a T-even bacteriophage, as known in 1952 Life cycle of a T-even bacteriophage, as known in 1952
Life in sulfur-rich, anoxic sediments Life in sulfur-rich, anoxic sediments
A Model of Natural Selection Favoring the Heterozygous Genotype A Model of Natural Selection Favoring the Heterozygous Genotype
Video: Introduction to Genetics

For a complete list of videos, visit our video library