18: What aspect of algae does the professor mainly discuss?


A) How it is used to supply food
B) How it has been important to the petroleum industry
C) How color is a way of classifying it
D) None of the above




19: What does the professor say about brown algae?


A) It is a chromist
B) It may be colorless
C) It is not sure how this type of chromist is related to other chromists
D) All of the above




20: What is the evidence that green algae are diverse in size?


A) Sea lettuce and kelp are examples of green algae
B) They only exist in one habitat
C) They contain chlorophyll
D) There are not as many types of green algae




21: What does the professor imply when he says this?


A) If you have been swimming where there are blue-green algae
B) If you have developed swimmer's itch
C) If you have found blue-green algae
D) If you want skin irritations




22: Why does the professor mention blue green algae are classified as cyanobacteria?


A) To explain the importance of its classification
B) To explain it is another classification for algae
C) To explain they are aquatic
D) To remind the students they need to memorize classifications




23: How does the professor explain the purpose of the lecture?


A) She explains the characteristics of algae
B) She compares each type of algae's characteristics
C) She describes the algae's role as aquatic organisms
D) She explains the lecture will be about types of coloured algae



.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.




Answers:

18: C
19: d
20: a
21: b
22: b
23: d