Answer: An independent variable, sometimes called an experimental or predictor variable, is a variable that is being manipulated in an experiment in order to observe the effect on a dependent variable, sometimes called an outcome variable.
Explanation: Example: What is a good outcome variable for deciding whether cancer treatment in a country has been improving?
A first thought might be "number of deaths in the country from cancer in one year." But number of deaths might increase simply because the population is increasing. Or it might go down if cancer incidence is decreasing. "Percent of the population that dies of cancer in one year" would take care of the first problem, but not the second.
This example makes the point that a rate is often a better measure than a count.
Answer:
Is there a picture that goes with this?
The elements that are required for the human body are in fixed percentages Whatever the weight of a person the percentage remains the same. Like 70-90% water is present in the human body whatever the weight of a person but the percentage of water remains the same in the body. There are six main elements present in the body which are basic and necessary for the human body are oxygen, nitrogen, carbon, phosphorus, calcium, and hydrogen.
This process is photosynthesis. It can be defined as the physico-chemical process by which photosynthetic organisms use light energy to drive the synthesis of organic compounds.
in the light dependent reactions of photosynthesis, photons from sunlight are used as a source of energy to split a water molecule from which electrons are obtained and added to the electron carrier molecule NADP which becomes NADPH.
NADPH is then used in the light independent reactions of photosynthesis called the Calvin cycle to drive the production of glucose, sucrose, starch, cellulose and other types of carbohydrates. These products are all organic compounds.
