My best explanation is
Some cancer is in blood and tissue and doesn’t form a tumor, such as leukemia. Therefore a usage of “chemotherapy” is needed.
Sorry if this isn’t a good explanation
Hi!
Could you please be more specific, so that I can answer your question properly? Layer of what?
A. A lab performs a test by giving bacterial colonies the same amount of different antibiotics and growing them under the same conditions.
B. A company that makes pain relief medication tests the effectiveness of their own medicine compared to that of three other brands.
C.
A student tests the attraction of bees to flowers by placing four different flowers in the same location and counting how many bees visit each.
D. A chemistry class performs an experiment in which each reaction has the same amount of starting material and begins at the same
Explanation:
The experiment that has bias the second one in which a company that makes pain relief medication tests the effectiveness of their own medicine compared to that of three other brands.
- A bias in an experiment originates from the experimenter influencing the desired outcome of the experiment.
- The pharmaceutical company will only be able to critique their own product devoid of the view of other pain relief products.
- This experiment will not give a good marketable opinions the company desires.
Learn more:
Experiment brainly.com/question/5249450
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It is necessary to measure air pressure because it gives an idea about the amount of gases dissolve in water, the density of air at a particular place,the direction of winds etc.
Explanation:
- The pressure exerted by the total volume of air in the Earth's surface is called air pressure. It is also called barometric pressure.
- The air pressure decreases with decrease in air density and increases with increase in air density.
- With increase in air pressure more oxygen is dissolved in water.
- The direction of winds on Earth is also determined by the pressure belts. The winds move from region of high pressure to low pressure. Thus, measurement of air pressure helps in weather forecast.
Answer:
A.)
Genetic differences permitted some mosquitoes to become immune to DDT.
Explanation:
DDT-resistant mosquitoes were first detected in India in 1959, and they have increased so rapidly that when a local spray program is begun now, most mosquitoes become resistant in a matter of months rather than years.
Hope this helps you out : )
