28.4 Red algae and green algae are the closest relatives of plants

Question 1

29) Theoretically, which two of the following present the richest potential sources of silica?
1. marine sediments consisting of foram tests
2. marine sediments consisting of diatom cases (valves)
3. marine sediments consisting of radiolarian shells
4. marine sediments consisting of dinoflagellate plates
A) 1 and 2
B) 1 and 4
C) 2 and 3
D) 2 and 4
E) 3 and 4

Answer 1

C) 2 and 3

Question 2

30) Thread-like pseudopods that can perform phagocytosis are generally characteristic of
which group?
A) radiolarians and forams
B) gymnamoebas
C) entamoebas
D) amoeboid stage of cellular slime molds
E) oomycetes

Answer 2

A) radiolarians and forams

Question 3

31) Which of the following produce the dense glassy ooze found in certain areas of the
deep-ocean floor?
A) forams
B) dinoflagellates
C) radiolarians
D) ciliates
E) apicomplexan

Answer 3

C) radiolarians

Question 4

32) A snail-like, coiled, porous test (shell) of calcium carbonate is characteristic of which
group?
A) diatoms
B) foraminiferans
C) radiolarians
D) gymnamoebas
E) ciliates

Answer 4

B) foraminiferans

Question 5

33) Typically as cells grow, their increase in volume outpaces their increase in surface area, and
continued survival requires undergoing asexual reproduction to reestablish a healthy
surface area to volume ratio. Thus, which of these is least likely to contribute to the ability of
a single-celled foraminiferan to grow to a diameter of several centimeters?
A) Its threadlike pseudopods dramatically increase its surface area to volume ratio.
B) Its symbiotic algae provide oxygen to the cytoplasm.
C) Its symbiotic algae absorb metabolic waste products from the cytoplasm.
D) Its symbiotic algae provide glucose to the cytoplasm.
E) Its calcium carbonate test contributes extra mass.

Answer 5

E) Its calcium carbonate test contributes extra mass.

Question 6

34) What makes certain red algae appear red?
A) They live in warm coastal waters.
B) They possess pigments that reflect and transmit red light.
C) They use red light for photosynthesis.
D) They lack chlorophyll.
E) They contain the pigment bacteriorhodopsin.

Answer 6

B) They possess pigments that reflect and transmit red light.

Question 7

34) What makes certain red algae appear red?
A) They live in warm coastal waters.
B) They possess pigments that reflect and transmit red light.
C) They use red light for photosynthesis.
D) They lack chlorophyll.
E) They contain the pigment bacteriorhodopsin.

Answer 7

B) They possess pigments that reflect and transmit red light.