Answer:
Hershey and Chase demonstrated that genetic material is contained in the DNA molecule. By using bacteriophages they observed that DNA, but not proteins, contains the genetic material. These researchers tagged DNA with radioactive phosphorus and then separated bacteria and protein phages by centrifugation, observing that bacterial pellet was radioactive
Answer:
B. Producing milk now requires electricity.
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Climate change causes changes in weather conditions over a long period of time.
<h3>What is climate change?</h3>
Climate change refers to those long time changes in the weather condition of a place.
The heat from current climate change ultimately comes from energy from the sun, trapped by carbon dioxide in the atmosphere.
As the earth's temperature increases, the processes on earth are affected such as increased precipitation and increased sea levels.
An example of a positive feedback loop is;
- Temperatures rising cause ice and snow to melt, which causes more heat to be absorbed by the ground, causing temperatures to rise more.
- Melting ice causes more sunlight to be reflected into the atmosphere, causing the temperatures on Earth to increase, which then causes more ice to melt.
The most effective way for an individual to reduce climate change on individual basis is to turn off the lights after leaving rooms.
Learn more about climate change: brainly.com/question/18784841
Increase in cell number for example virus
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Before viruses can reproduce, they must infect a host cell.
Viruses need a way to enter the body before they can infect a host cell.