D Question 16 Which of the following examples best demonstrate diffusion? O The spreading of dye in a beaker of water O The use of a sodium-potassium pump O An amoeba engulfing a bacterium O Cellular movement

the spread of dye in a beaker of water

common management practices in dairy and poultry farming are: (i) proper shelter facilities and their regular cleaning. (ii) some basic hygienic conditions such as clean water, nutritious food, etc. (iii) animals are kept in spacious, airy, and ventilated place.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.