« previous next »

Author Question: About 25 of the 92 natural elements are known to be essential to life. Which fou (Read 1103 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?

Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.

Did you know?

Hip fractures are the most serious consequences of osteoporosis. The incidence of hip fractures increases with each decade among patients in their 60s to patients in their 90s for both women and men of all populations. Men and women older than 80 years of age show the highest incidence of hip fractures.

Did you know?

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

Did you know?

Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.

Did you know?

The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

The birth weight of human infants is tightly constrained by natural selection. The birth weight of human infants is tightly constrained by natural selection.
Effective communications skills are essential to the medical assistant’s career Effective communications skills are essential to the medical assistant’s career
Life cycle of Entamoeba histolytica. Life cycle of Entamoeba histolytica.
ELEMENTS OF ARCHITECTURE: The Roman Arch "القوس الروماني" ELEMENTS OF ARCHITECTURE: The Roman Arch "القوس الروماني"
Stages of Natural Fetal Birth "مراحل الولادة الطبيعية" Stages of Natural Fetal Birth "مراحل الولادة الطبيعية"
Food Sources of the Essential Fatty Acids Many oils and nuts Food Sources of the Essential Fatty Acids Many oils and nuts
Video: Introduction to Autism

For a complete list of videos, visit our video library