Microscopy and Biological Drawing

In the space below make a large drawing of the cell labelled A as it appears in the photomicrograph.

Draw a line on your drawing to label the cell wall W.

Complete the table by describing three visible differences between cell A and cell B.

Draw a straight line on cell B on the photomicrograph on page 7 to join C–D.

Measure and record the length of this line.

length of line C–D = ______ $\text{mm}$

Use your measurement in (c)(i) to calculate the actual diameter of cell B. Give your answer to 2 decimal places.

______

In the space below make a large drawing of the plant as it appears in the photomicrograph.

Draw a straight line on the photomicrograph to join lines G and H. Measure the length of this line and record it.

______

Use your measurement to calculate the actual length of the plant. Round your answer to 3 decimal places.

______ $\text{mm}$

Describe how you would find out whether a sample of pond water contained this plant.

______

Identify this organ ______

Name the structures labelled A ______

In the space below, make a large drawing of this organ as it appears in the photograph.

On the photograph, draw a line between B and C.

Measure and record this length.

______ $\text{mm}$

On your drawing, draw a line at the same location as the line B–C.

Measure and record the length of this line.

______ $\text{mm}$

Use your measurements in (c)(i) and (c)(ii) to calculate the magnification of your drawing compared to the photograph. Give your answer to one decimal place.

magnification $\times$ ______

Make a large drawing of the two guard cells between points C and D and the epidermal cells touching the guard cells.

Measure the length of a guard cell in the photomicrograph between points C and D.

______ $\text{mm}$

The actual length of the guard cell is $0.07\text{ mm}$. Calculate the magnification of the photomicrograph to the nearest whole number.

magnification $\times$ ______

In the space below, make a large drawing of the cell labelled P. You do not need to label your drawing.

Measure and record the maximum length of cell P in Fig. 3.1.

Maximum length of cell P in Fig. 3.1 = ______ $\text{mm}$

Use the magnification of Fig. 3.1 to calculate the actual length of cell P.

Show your working.

______

State two structures, visible in Fig. 3.1, that are found only in plant cells.

1. ______
2. ______

Complete Table 2.1 by describing differences that can be seen between the named features of the blood cells in these two samples.

Table 2.1

The cell labelled X in Fig. 2.1 measures $10\text{ mm}$ in length.

Calculate the actual length of cell X. Show your working.

actual length = ______

A human red blood cell is $0.007\text{ mm}$ in diameter.

Calculate the number of times a human red blood cell is larger than the frog red blood cell. Show your working.

______

Explain how, using features visible in Fig. 2.1 and Fig. 2.2, blood is adapted for transporting oxygen around the body.

______

List four visible features that are the same in both insects.

1. ______
2. ______
3. ______
4. ______

Complete Table 2.1 with four pairs of differences that are visible in these insects.

Table 2.1

In the specimen from which Fig. 2.1 was made, the length of the wing labelled W was $40\text{ mm}$.

Calculate the magnification of the insect shown in Fig. 2.1.

Show your working clearly.

magnification = ______

In the space below make a large drawing of the cell labelled C as it appears in the photomicrograph.

Identify the cells labelled C and D.

C = ______
D = ______

Complete the table by describing three visible differences between cell C and cell D.

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

Measure and record the length of this line.

length of line on drawing = ______ $\text{mm}$

Use your measurements in (i) and (ii) to calculate the magnification of your drawing compared to the photomicrograph. Give your answer to 1 decimal place.

magnification $\times$ ______

In the space below, make a large drawing of the plant section as it appears in the photomicrograph.

On your drawing, draw a straight line in the same position as the line A–B you have drawn on the photomicrograph. Measure and record the length of this line.

length of line on drawing = ______ $\text{mm}$

Use your measurements in (b)(i) and (b)(ii) to calculate the magnification of your drawing compared to the photomicrograph. Record your answer to 2 decimal places.

Show your working.

magnification $\times$ ______

In the space below make a large drawing of the animal and its shell as shown in Fig. 2.1. Do not include the surface detail of the body of the animal.

On your drawing, draw a line at the same location as the line A–B.

Measure and record the length of this line.

length of line on drawing = ______ $\text{mm}$

Use your measurements in (b)(i) and (ii) to calculate the magnification of your drawing compared to the photograph. Give your answer to 1 decimal place.

magnification $\times$ ______