1. Materia: Biology Senior 3
Profesor: Ma. Magdalena Ravagnan
Contenido nodal: The organisation of life and the organism
PRIMER TRIMESTRE
Fecha de presentación: Tuesday February 19th
A- Characteristics and classification of living organisms
1) Fig. 1.1 shows a mayfly nymph (a larva) that lives in water.
(a) (i) List two features, visible in Fig. 1.1, that show this is an insect.
1…………………………………………………………………………………………………………………………..
2………………………………………………………………………………………………………………………… [2]
(ii) What special adaptation does the insect shown in Fig. 1.1 have that allows it to live in water?
…………………………………………………………………………………………………………………………….[1]
(b) Fig 1.2 shows five mayfly nymphs.

2. Use the key below to identify the species of each mayfly.
Write the diagram letter of each of the species in the correct box of Table 1.1.
[4]
2) Five types of animal and plant cells and five possible functions of such cells are shown below.
Draw one straight line from each type of cell to a function of that cell.

3. 3) Fig. 6.1 shows a plant cell from a leaf.
(a) State the letters for the three parts of this cell that only occur in plant cells.
(a) State precisely where palisade cells are found in a plant.
(b) State two differences in structure between this leaf cell and a root hair cell.
Explain the reason for each difference.
4) Explain what happens to a red blood cell when is placed in a concentrated solution.
5) i- Complete the table:
SUBSTRATE ENZYME PRODUCT
Starch
Protease
Fatty acids + glycerol
ii- Explain what happens to the activity of an enzyme when it is boiled.