WHICH IS BIGGER? 1

PART 1: Print the 7 pictures (Raven and Johnson, Biology, 5th Edition, 1999). After printing the pictures, use the magnification scales to determine the actual size of each organism. Record the diameter or length (longest axis of the longest specimen). Select the unit that is appropriate.

A. cancer cell (8000x)

B. egg (cleavage furrow) (30x)

C. onion root cell (500x)

D. human chromosome (950x)

E. protist (1000x)

F. influenza virus (30,000x)

G. yeast (19,000x)

PART 2: In each of the following pairs of pictures, select which of the 2 organisms is longer (using the longest available axis) or which has the greatest diameter.

A. yeast vs. cancer cell

B. influenza virus vs. protist 

C. onion root tip cell vs. egg (cleavage furrow)

D. human chromosome (select the longest) vs. cancer cell

E. protist vs. yeast

F. influenza virus vs. human chromosome

G. onion root cell vs. cancer cell

H. protist vs. egg (cleavage furrow)

PART 3: Sequencing. Order the specimens (A to G) by size. Put the smallest first.

___________________, _____________________, _____________________,

___________________, _____________________, _____________________,

and _______________________.

PART 4: Draw a line that is 10 centimeters long.

How many millimeters is the line?

How many micrometers is the line?

How many nanometers is the line?

How many Angstroms is the line?

For each of the organisms listed, determine how many of each would fit on the line if they were put end-to-end:

A. cancer cell

B. egg (cleavage furrow)

C. onion root cell

D. human chromosome

E. protist

F. influenza virus

G. yeast

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