In a recent experiment, anti-bacterial hand sanitizer was compared to hand soap. Students washed their hands using the sanitizer or soap and warm water for two minutes; then they dried their hands with a paper towel. The standard of comparison was rubbing hands vigorously for 2 minutes in warm water, without any soap or sanitizer, and then drying with a paper towel. The sanitizer advertisement claimed to kill bacteria more effectively than any soap. After washing, hands were swabbed and then the swab applied to a culture plate and incubated. Finally, the bacterial cultures were counted. Students using the antibacterial santizer had the lowest bacterial culture count. What is the control in the experiment? A) washing with soap B) rubbing vigorously C) the time: two minutes D) rubbing hands in warm water
Answers: 3
Biology, 22.06.2019 03:00
1. watermelon, papaya, oranges, bananas, and lemons are included in this food group. vitamin c 2. you need 6 or more servings of this food group each day vitamins d and a 3. found in fruit and keeps blood vessels healthy calcium 4. vitamins found in milk bread and grain 5. a mineral that strengthens bones fruit
Answers: 3
Biology, 22.06.2019 10:30
In a lab, scientists grew several generations of offspring of a plant using the method shown. what conclusion can you make about the offspring? a. they formed from meiosis and mitosis. b. they have half the number of chromosomes as their parent. c. they have low genetic variability among them. d. they will be able to reproduce only after they grow flowers.
Answers: 2
Biology, 22.06.2019 11:00
Which of the following are not included as modern mammals that evolved during the eocene epoch? primates artiodactyls perissodactyls none of the above
Answers: 1
Biology, 22.06.2019 12:20
Agene editing technology called crispr-cas9 uses cellular machinery to change the cell's genetic material. how might this technology be useful in treating diseases like cancer?
Answers: 3
In a recent experiment, anti-bacterial hand sanitizer was compared to hand soap. Students washed the...
Mathematics, 17.07.2019 09:30
History, 17.07.2019 09:30
World Languages, 17.07.2019 09:30
Mathematics, 17.07.2019 09:30
Biology, 17.07.2019 09:30
Biology, 17.07.2019 09:30
English, 17.07.2019 09:30
Social Studies, 17.07.2019 09:30
Spanish, 17.07.2019 09:30
Mathematics, 17.07.2019 09:30