Protozoans and Metazoans using a Dichotomous Key

Question 1

white or colorless
slow creeping, shape varies by extension or withdrawal of pseudopodia

Answer 1

amoeba

Question 2

white or colorless
exhibits other motion
cell locomotes using cilia
body not entirely covered with cilia; has specialized groups of cilia - locomotes by “walking” using cirri (fused cilia)

Answer 2

euplotes

Question 3

white or colorless
exhibits other motion
cell locomotes using cilia
body entirely covered with cilia
large elongate cell, “cigar-shaped” with rounded ends; moderately fast swimmer

Answer 3

paramecium

Question 4

white or colorless
exhibits other motion
cell locomotes using cilia
body entirely covered with cilia
small oval-shaped cell, fast swimmer, swims with a corkscrew motion

Answer 4

colpidium

Question 5

white or colorless
exhibits other motion
cell locomotes using a long strip-like flagellum (no cilia)
cells elongate with narrow posterior

Answer 5

Chilomonas

Question 6

white or colorless
exhibits other motion
cell locomotes using a long strip-like flagellum (no cilia)
elongate with a broad rounded or truncate posterior end during locomotion, highly plastic when stationary, often appears to vibrate when in motion

Answer 6

peranema

Question 7

colored
green color
spherical colony of many hundreds of cells

Answer 7

volvos

Question 8

colored
color not green
red or rose-colored

Answer 8

blepharisma

Question 9

colored
green color
elongate single cell

Answer 9

Euglena

Question 10

colored
color not green
dark blue green, trumpet shaped

Answer 10

stentor