A control is a experimental variable that is kept constant or unchanged during an experiment. During a controlled experiment, the controlled variables are held constant to minimize or stabilize their effects on the subject, its unchanging state allows the relationship between the other variables being tested to be better understood.
XX if female and XY is male
The answer is false.
Because DNA only sends genetic info.
After reading the contents of the table shown in the attached picture, I am pretty sure that the <span>statement which is the best interpretation of the material presented in the chart is being shown in the first option: </span><span>Scientific explanations are built by combining evidence that can be observed with what people already know. I choose this option as I recognized sort of 'cause&effect' information. In the first one you can see some well-known facts and in the other picture you can see accurate information gathered by scientists due to those facts.
Hope that helps!</span>
