Multiple Choice Quiz


1	1. The alga thallus is composed primarily of undifferentiated tissue that can be single cells, filamentous, or parenchymatous.
		A)	True
		B)	False


2	2. Unlike plants, algae zygotes develop into a multicellular embryo that is retained in the female gametangium.
		A)	True
		B)	False


3	3. The blue-green color of the cyanobacteria is due to the presence of _______.
		A)	a. phycoerythrin
		B)	b. phycobilins
		C)	c. phycocyanin
		D)	d. chlorophylls
		E)	e. both b and d


4	4. What is the function of heterocysts in the cyanobacteria?
		A)	a. nitrogen fixation
		B)	b. asexual reproduction
		C)	c. sexual reproduction
		D)	d. photosynthesis
		E)	e. cell death


5	5. Which division of algae is composed of silicon-based walls that are formed in halves?
		A)	a. Euglenophyta
		B)	b. Bacillariophyta
		C)	c. Cyanobacteria
		D)	d. Dinophyta
		E)	e. Chlorophyta


6	6. Which of the following features describes euglenoids?
		A)	a. Proteinaceous covering instead of rigid cell wall
		B)	b. Abundant in nutrient-rich freshwater
		C)	c. Presence of large red eye spot
		D)	d. All of the above
		E)	e. Only a and b


7	7. Algae in the Division Chlorophyta are characterized by a flexible pellicle and two flagella.
		A)	True
		B)	False


8	8. Sexual reproduction in which the egg is large and nonmotile and the sperm is smaller and flagellated is called _______.
		A)	a. gametangia
		B)	b. anisogamy
		C)	c. isogamy
		D)	d. oogamy
		E)	e. zoosporous


9	9. Which of the following algae, commonly known as sea lettuce, is multicellular and attached by means of holdfast?
		A)	a. Chlamydomonas
		B)	b. Ulva
		C)	c. Euglena
		D)	d. Both a and c
		E)	e. Both b and c


10	10. Fucus is an alga in the Division Phaeophyta that produces spherical cavities called conceptacles used in sexual reproduction.
		A)	True
		B)	False


11	11. Algae are valued nutritionally because of their high ________ content.
		A)	a. lipid
		B)	b. folic acid
		C)	c. vitamin D
		D)	d. protein
		E)	e. both b and c


12	12. The food additives carrageenan and agar are obtained from red algae, whereas alginic acid is derived from brown algae.
		A)	True
		B)	False


13	13. Drug testing for sea-based pharmaceuticals has been slow to develop due to
		A)	a. the toxic compounds found in most algae.
		B)	b. the inability to secure adequate amounts.
		C)	c. the lethal side effects of most algae.
		D)	d. all of the above.
		E)	e. none of the above.


14	14. Red Tides are caused by ___________.
		A)	a. diatoms
		B)	b. red algae
		C)	c. dinoflagellates
		D)	d. euglenoids
		E)	e. both a and b


15	15. Which of the following organisms produces powerful toxins that can cause massive fish kills?
		A)	a. Pfiesteria
		B)	b. Gymnodinium
		C)	c. Chaetoceros
		D)	d. all of the above
		E)	e. only b and c


16	16. Which kind of algae is among the largest organisms on earth?
		A)	a. red algae
		B)	b. kelp
		C)	c. sea lettuce
		D)	d. all of the above
		E)	e. none of the above


17	17. Which of the following is NOT a reason for the success of this exotic alga, Caulerpa taxifolia?
		A)	a. They reproduce easily by asexual reproduction.
		B)	b. They can grow on any ocean substrate.
		C)	c. They thrive in cold water.
		D)	d. none of the above.
		E)	e. a and c are correct.


18	18. Which of the following algae are important in human diet?
		A)	a. Spirulina
		B)	b. Laminaria
		C)	c. Porphyra
		D)	d. All of the above
		E)	e. Only b and c

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