Answers by Dror Bar
Register

Answers by Dror Bar

Answers by Dror Bar
Filter
A radioactive substance has a half-life of 5 million years. What is the age of a rock in which 25% of the original radioactive atoms remain? Choose one answer. a. 2.5 million years b. 5 million years c.
answered Dec 23, 2017
2 votes
210k views
Which two biomes have moderate precipitation levels?
answered Dec 22, 2017
4 votes
233k views
If 15% of the nucleotides in a DNA molecule contain guanine, what percentage of the nucleotides contain each of the other bases? Explain your reasoning.
answered Nov 9, 2017
2 votes
17.9k views
Bacteria that cause foodborne illness don t stop multiplying at refrigeration temperatures, they just slow down. a. True b. False
answered Sep 14, 2017
6 votes
152k views
What value could be added to 2/15 to make the sum greater than 1/2
answered Apr 2, 2017
5 votes
213k views
What was “the shot heard around the world”? A. the Boston Massacre B. the Battle of Saratoga C. the publication of the Declaration of Independence D. the outbreak of fighting at Lexington and Concord
answered May 14, 2016
4 votes
143k views
Page:
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

8.1m questions

10.8m answers