Biology 9-1 0970: Transport in Plants and Animals Topical Past Paper Questions

Fig. 2.1 shows red blood cells in three different concentrations of salt solution. Fig. 2.1 (a) (i) Using the information in Fig. 2.1, state the letter of the salt solution that has a concentration similar to blood plasma. Explain your choice. salt solution explanation (ii) Using…

(a) Complete the sentences about human teeth. The process of taking food into the mouth is called ..... . Flat sharp-edged teeth at the front of the mouth, called ..... , are used for biting off pieces of food. The ..... and ..... are the large teeth towards the back of the mouth…

(a) A student investigated osmosis in potato plant cells. He immersed cubes of potato tissue in water and different concentrations of sucrose solution for 30 minutes. The masses of the potato cubes were measured before and after immersion. The percentage changes in mass were calc…