Again... pls look at the answer key!! :-)
Part 1 of 4 - 25.0/ 25.0 Points
Question 1 of 20 5.0/ 5.0 Points
Which of the following terms would not be associated with flatworms?
Correct
A. Sessile
B. Acoelomate
C. Cephalization
D. Hermaphrodite
E. Bilateral symmetry
Answer Key: A
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Question 2 of 20 5.0/ 5.0 Points
If you were infected with a tapeworm, you would have this type of worm inside you:
Correct
A. A flatworm
B. Oligochaete
C. A roundworm
D. Polychaete
E. A fluke
Answer Key: A
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Question 3 of 20 5.0/ 5.0 Points
If the cells of a sponge are mechanically separated by a coarse cloth bag, the cells then
A. die from being separated.
B. form spicules in the pattern of the cloth.
C. go back to primitive cells and soon differentiate.
Correct
D. reassemble into a new organized sponge with each cell resuming its original job.
E. reproduce sexually.
Answer Key: D
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Question 4 of 20 5.0/ 5.0 Points
Cnidarians have all of the following characteristics except:
A. They live in salt and fresh water.
B. They capture their prey.
C. They have radial symmetry.
Correct
D. They have three germ layers.
E. They have two body forms: polyp and medusa.
Answer Key: D
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Question 5 of 20 5.0/ 5.0 Points
A __________ of a tapeworm contains both male and female sex organs and becomes filled with developing embryos.
A. gastrovascular cavity
B. nematocyst
Correct
C. proglottid
D. cyst
E. scolex
Answer Key: C
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Part 2 of 4 - 20.0/ 25.0 Points
Question 6 of 20 5.0/ 5.0 Points
This figure shows the organization of the plant body. What does "d" represent?
A. An axillary bud
B. A lateral branch root
Incorrect
C. The terminal bud
D. The internode
E. The node
Answer Key: D
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Question 7 of 20 5.0/ 5.0 Points
The portion of the plant located at the shoot tip is referred to as
Correct
A. the terminal bud.
B. the vascular tissue.
C. the internode.
D. the petiole.
E. the node.
Answer Key: A
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Question 8 of 20 0.0/ 5.0 Points
A plant physiologist is studying the parts of the shoot system in a plant. Based on this information, which of the following would he or she not be interested in studying?
Incorrect
A. The petioles
B. The nodes
C. The internodes
D. The axillary buds
E. The roots
Answer Key: E
Feedback: The roots belong to the root system, not the shoot system.
Question 9 of 20 5.0/ 5.0 Points
Cells of the ground tissue system are called
A. endodermis and phloem cells.
B. epidermal cells.
C. tracheids and vessel elements.
D. sieve-tube and companion cells.
Correct
E. parenchyma, collenchyma, and sclerenchyma cells.
Answer Key: E
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Question 10 of 20 5.0/ 5.0 Points
Sclerenchyma cells have thick secondary cell walls impregnated with this organic substance that makes the walls tough and hard.
A. Cellulose
Correct
B. Lignin
C. Cuticle
D. Xylem
E. Pith
Answer Key: B
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Part 3 of 4 - 20.0/ 25.0 Points
Question 11 of 20 5.0/ 5.0 Points
The contents of the phloem always move down the stem of the plant.
Correct
True
False
Answer Key: False
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Question 12 of 20 5.0/ 5.0 Points
If you were studying the water-proofing strip which surrounds the cells of the endodermis and forces water to pass through the cells of the endodermis instead of around them you would be studying
A. the guard cells.
B. the cuticle.
C. the companion cells.
Correct
D. the casparian strip.
E. the xylem sap.
Answer Key: D
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Question 13 of 20 5.0/ 5.0 Points
With the aid of a microscope you are examining the cells which border a stoma and regulate its opening and closing. Which of the following cells would you be looking at?
A. Xylem cells
B. Casparian cells
Correct
C. Guard cells
D. Mesophyll cells
E. Tracheid cells
Answer Key: C
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Question 14 of 20 0.0/ 5.0 Points
Guard cells open a stoma because
A. potassium ions move out of the guard cells followed by water moving out.
B. potassium ions move into the guard cells followed by water moving in.
Incorrect
C. potassium ions move into the guard cells followed by water moving out.
D. potassium ions move out of the guard cells followed by water moving in.
E. water moving into the guard cells followed by potassium ions moving out.
Answer Key: B
Feedback: Potassium ions (K+) accumulate within guard cells when a stoma opens. In other words, the entrance of K+ into guard cells creates an osmotic pressure that causes water to follow by osmosis. Then a stoma opens. On the other hand, a stoma closes when turgor pressure decreases due to the exit of K+ followed by the exit of water.
Question 15 of 20 5.0/ 5.0 Points
The waxy covering of the upper and lower epidermis which is found in some plants is known as the
A. stomata.
Correct
B. cuticle.
C. guard cells.
D. Casparian strip.
E. phloem sap.
Answer Key: B
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Part 4 of 4 - 10.0/ 25.0 Points
Question 16 of 20 0.0/ 5.0 Points
Of the organisms listed below, which is not important in the dispersal of seeds in plants?
A. Butterflies
B. Squirrels
C. Bears
D. Raccoons
Incorrect
E. Ants
Answer Key: A
Feedback: Butterflies do feed on nectar and can pollinate flowers but do not carry seeds.
Question 17 of 20 5.0/ 5.0 Points
Which of the following is not an example of an asexual structure in plants?
A. Tubers
Correct
B. Stamens
C. Stolons
D. Corms
E. Rhizomes
Answer Key: B
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Question 18 of 20 5.0/ 5.0 Points
Cells which have the genetic capability of becoming an entire plant are referred to as:
A. Globular
B. Sporophyte
C. Gametophyte
D. Somatic
Correct
E. Totipotent
Answer Key: E
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Question 19 of 20 0.0/ 5.0 Points
Which of the following parts of the plant embryo grows downward?
A. The epicotyl
B. The radicle
C. The hypocotyl
D. The plummule
Incorrect
E. The shoot
Answer Key: B
Feedback: The radicle of a seed grows down into the soil.
Question 20 of 20 0.0/ 5.0 Points
Double fertilization in angiosperms produces:
A. A triploid embryo and a diploid endosperm
B. A diploid zygote and a triploid endosperm
C. A diploid zygote and a diploid endosperm
D. A diploid embryo and a triploid zygote
Incorrect
E. A diploid zygote and a haploid polar nucleus
Answer Key: B
Feedback: Double fertilization in plants produces a diploid zygote and a triploid endosperm.
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