<span>Answer : D. The factor
that's changed by the experimenter and impacts the dependent variable.<span>
</span><span>An
independent variable is a variable in which you can manipulate or control while
the dependent variable depends on the independent variable. An
example of an independent variable is the running while the dependent variable
is your pulse rate. The pulse rate depends on how fast and how long is the
distance of your run. The pulse rate maybe higher and faster if you’ve run quite
long and will be close to stable if you only run for a short distance and slow
speed.</span></span>
Answer:
Oxygen liberated during photosynthesis comes from the splitting or hydrolysis of water in the green plants. Cornelius van Niel experimentally proved for the first time that the oxygen liberated during photosynthesis comes from water and not from carbon dioxide.
The common function shared by alveoli, capillaries and glomerular capsules are lined with simple squamous epithelium so they are all involved where absorption or transport of the materials occur. The function of the squamous epithelium is mainly selective transmembrane transportation either by using the concentration gradient or by active transport by using the membrane bound carrier proteins.
The pulmonary alveoli are highly vascular in structure and are formed by a layer of the squamous epithelial cells and a network of capillaries.
The capillaries are also made up of squamous epithelial cells and gas exchange between the alveoli and blood vessels occurs through these capillaries.
