Answer:
B) The conclusion is not valid; there were fewer bacteria cultures on the soap plates
Explanation:
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 and recorded in the data table. Students concluded that the hand sanitizer was most effective in killing bacteria. How would you respond to the students' conclusion?
Hand Washing Test Hand Washing Test
Treatment Bacterial cultures (#/plate)
Warm water 24
Hand sanitizer 28
Soap A 12
Soap B 13
The above table should have been included before the question. From the table we can conclude that
B) The conclusion is not valid; there were fewer bacteria cultures on the soap plates
Which also means that the sanitizer is not as effective as warm water. it is the least effective solution to kill bacterial.
Answer:
b. All primates rely more on vision and less on their sense of smell.
Explanation:
Primates make up a group of vertebrate animals and include apes (monkeys), lemurs and humans. All these beings have many similarities to each other, for example, all primates usually have five digits on each hand and foot, primates tend to have large brains in relation to body size and the larger the smarter brain the primate is, primates usually give birth one baby at a time. Not all primates rely more on sight and less on smell; humans tend to rely on sight more than on smell, but most other primates have more developed than humans, so the smell is more important to them.
Sweat helps you cool down in two ways. First, it makes your skin feel cooler when it's wet. Second, when it evaporates, it removes heat off your body! Hope this helps! :)
Heating a substance causes molecules to speed up and spread slightly further apart, occupying a larger volume that results in a decrease in density. Hot water is less dense and will float on room-temperature water. Cold water is more dense and will sink in room-temperature water.