Answer:
Option B is the correct option.
Explanation:
According to the map the merged land , ocean are presenting the temperature shown as anomalies from 2008 to 2015 for North Africa were the temperature was warmer then average in the month of during mid July.
Human. they are the only ones with mammary glands, hair, and four limbs
The walls of the cell membrane is what strengthens it
C; A is false they sometimes exhibit recessive genes, B is true but not all species die from these diseases and D is also false
Having a controlled group is very important.
Reason: If scientists did not have a controlled group then, they would have data for the test but they might know if the results changed or not. Scientists need a controlled group because the controlled group is like the original. They need the original group to help them know what improved or did not improve.
For example, if you were testing whether or not different types of music helps with studying, then you will need a group that does not listen to music so you can know if different types of music actually improve or just make studying worse.
Having a controlled group helps you know the difference between observations in a easier way. The controlled group is not something people should ignore. It might seem useless at first but, when a person starts to finish up their project or test then, they will understand why a controlled group is important. By the time they do, it might be too late so make sure you people use a controlled group(Especially in the Science Projects).
(Hope this helps : ) )
