Observations and Measurements

Explain how you would calculate the area of leaf that has been removed.

Calculate the area of leaf that has been removed. Each square has an area of $16\text{ mm}^2$.

Show your working.

______

Describe three visible similarities between your hand and that of the orang-utan shown in Fig. 3.1.

1. ______
2. ______
3. ______

Describe two visible differences between your hand and that of the orang-utan shown in Fig. 3.1.

1. ______
2. ______

Use the table to describe two differences between bones C and D as they appear in the photograph.

On the photograph measure the length of bone D.

______ $\text{mm}$

Use your measurement to calculate the actual length of bone D.

Show your working.

______

Complete Table 2.1.

Explain why each part of the skin was touched ten times.

______

Complete the headings in Table 1.1.

Table 1.1

Enter the data from Fig. 1.2 and Fig. 1.3 into Table 1.1.

Calculate the mean times for the filter paper discs, from tissues A, B and C, to reach the surface. Record all the values to the nearest whole second.

On the photograph, draw a line between F and G.

Measure and record this length.

______ $\text{mm}$

On your drawing, draw a line at the same location as the line F–G.

Measure and record the length of this line.

______ $\text{mm}$

The photomicrographs show the detail of the same organ from a smoker and a non-smoker.

Both photomicrographs are to the same scale.

Complete the table to identify two differences between the two photomicrographs.