An experimental group is the group in an experiment that receives the variable being tested. One variable is tested at a time. The experimental group is compared to a control group, which does not receive the test variable. In this way, experimental groups are used to find answers in an experiment.
1 At around 9 months of age, babies begin to pull themselves up to a standing position. 2  By 10 months of age, a baby should be able to grasp objects with thumb and forefinger.
By the age of three, a childâs eyes will usually settle into their permanent, adult color â be it blue, green, hazel, amber, grey, dark brown or even blood red. Below is a simple baby eye color prediction chart, based on heterozygous (the most likely) odds.