<span>It can be noted by seeing the changes in chemical makeup of the rock through oxydation & hydrolysis.</span>
<span>Transporting molecules through a membrane against their concentration gradient is called active transport. It needs a transporter (protein) and energy (ATP).
ATP doesn't bind to the glucose molecules, the transporter does.
Also the glucose isn't broken down
So the only correct answer is B :)</span>
Well meadows start off as small ponds so through the natural way of transformation can they change.
Active transport refers to a substance moving from areas in which it has low concentration to an area with high concentration, one example i guess is endocytosis, "<span>the taking in of matter by a living cell by invagination of its membrane to form a vacuole"</span>
<h3>
Most railroad tracks are built from pieces of steel supported by wooden ties, and laid with a gap between the ends. </h3>
Explanation:
The reasons are:
Firstly , the thermal expansion of solid at higher temperatures.
During the summer season, the steel tracks may expand due to thermal expansion and if gaps are not laid the tracks will bend and lead to accidents.
Secondly, imbibition of water during rainy season.
During the rainy season the wooden tracks will imbibe water and swell. If gaps are not provided, this may result irregular levels of railway track. This may prove very dangerous and lead to railway accident.
