Answer:
The answer is Pulmonary alveoli
Explanation:
Pulmonary alveoli are the primary gas exchange site. The alveoli are in intimate contact with the surrounding capillaries, removing the CO2 from the blood and passing the oxygen through a pressure gradient. This barrier between air and blood has a thickness of approximately one micron. To maintain this exchange gradient to the lungs, between 5 and 8 L of air per minute must enter.
The correct answer is; Transitivity.
Further Explanation:
In "Piaget's theory of cognitive development" he has several stages that a child will go through to learn different things. In the third stage of the theory, he theorizes that a child will go through transitivity.
The third stage is called the "Concrete Operational Stage." It is believed that in this stage a child will look at things and mentally operate on the basis that events and things that are concrete to them. This stage is said to occur when the child is between the ages of 7-12 years old.
Learn more about Piaget's theory of cognitive development at brainly.com/question/6959305
#LearnwithBrainly
Answer:
I would say Option B
Explanation:
A controlled experiment is where you have two or more independent variables, that way you have an experiment to compare results with.
