Author: Biology Junction Team

Flat and Roundworms Study Guide

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Flat and Roundworms Quiz

 

 

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 1.
Planarians can reproduce asexually by
a.
 fission.
c.
 producing polyps.
b.
 forming larvae.
d.
 exchanging both sperm and eggs.
 2.
Which of the following is not found in flatworms?
a.
 an anterior end
c.
 bilateral symmetry
b.
 a circulatory system
d.
 a nervous system
 3.
Flatworms have no need for circulatory and respiratory systems because
a.
 the digestive system performs these functions.
b.
 their cells are close to the animal’s exterior surface.
c.
 the spherical body shape allows diffusion of materials into tissues.
d.
 the coelom is bathed in blood and oxygen.
 4.
Schistosomiasis is a disease caused by a
a.
 roundworm.
c.
 cestode.
b.
 trematode.
d.
 planarian.
 5.
turbellarians : free-living ::
a.
 planaria : parasitic
c.
 cestodes : free-living
b.
 tapeworms : free-living
d.
 flukes : parasitic
 6.
Which of the following statements about tapeworms is false?
a.
 They can infect a person who eats undercooked food.
b.
 They belong to the genus Schistosoma.
c.
 They can grow to be large in human intestines.
d.
 They do not have a digestive system.
 7.
To which phylum do roundworms belong?
a.
 Annelida
c.
 Platyhelminthes
b.
 Nematoda
d.
 Arthropoda
 8.
Roundworms have a fluid-filled cavity called a
a.
 coelom.
c.
 digestive system.
b.
 pseudocoelom.
d.
 None of the above
 9.
Roundworms have a digestive tract with ____ opening(s).
a.
 three
c.
 one
b.
 two
d.
 no
 10.
All of the following groups of invertebrates are coelomates except
a.
 annelids.
c.
 mollusks.
b.
 echinoderms.
d.
 nematodes.
 11.
A roundworm’s digestive tract can be considered an advancement over a gastrovascular cavity because
a.
 food moves through it in only one direction.
b.
 different parts of the tract can carry out different functions.
c.
 undigested wastes do not have to leave through the same opening where food is taken in.
d.
 All of the above
 12.
The nematode Ascaris lumbricoides infects humans, spending most of its adult life inside the intestines of its host. To be infected, a person must
a.
 consume the nematode’s eggs.
b.
 walk barefoot on infested soil.
c.
 sit on an infested toilet seat.
d.
 All of the above
 13.
A type of roundworm that lives a parasitic life is
a.
 Ascaris.
c.
 Trichinella.
b.
 Enterobius.
d.
 All of the above
 14.
A rotifer uses ____ to collect excess water in order to remove the water from the body.
a.
 diffusion
b.
 kidneys
c.
 flame cells and excretory tubules
d.
 a mastax
 15.
Which of the following statements is not true?
a.
 Most tapeworms are hermaphrodites.
b.
 Planarians reproduce both sexually and asexually.
c.
 Some rotifers reproduce by parthenogenesis.
d.
 Because they are all parasitic, roundworms reproduce asexually.
 16.
Tapeworms absorb food from the host through their
a.
 scolex.
c.
 suckers.
b.
 tegument.
d.
 None of the above
 17.
Humans can avoid trichinosis by
a.
 avoiding undercooked meat.
b.
 avoiding public restrooms.
c.
 wearing shoes outdoors.
d.
 washing their hands frequently.
 18.
Which of the following has a cloaca?
a.
 a fluke
c.
 a rotifer
b.
 a nematode
d.
 a tapeworm
 19.
Parasitic flatworms
a.
 probably evolved from free-living organisms.
b.
 gave rise to free-living flatworms.
c.
 have a gut with two openings.
d.
 are found mostly in the class Turbellaria.
 20.
Which of the following is not true about the planarian nervous system?
a.
 It includes a ladderlike arrangement of nerves.
b.
 It provides the ability to sense light intensity.
c.
 It includes one ventral nerve cord.
d.
 It provides the ability to learn.
 

Completion
Complete each statement.
 21.
A schistosome is a member of the phylum ____________________.
 22.
The ability of some animals, such as flatworms, to regrow lost parts of their bodies is called ____________________.
 23.
Flatworms take up oxygen and release carbon dioxide by the process of ____________________, which occurs across the body surface of the animals.
 24.
The ____________________ is a protective cellular covering of the bodies of endoparasitic flukes that prevents them from being digested by their hosts.
 25.
____________________ are rectangular body sections of tapeworms.
 26.
Roundworms are members of the phylum ____________________.
 27.
Roundworms take in food through the mouth and eliminate wastes through an opening at the other end of the digestive tract called the ____________________.
 28.
Organisms that feed by using cilia to sweep food into their mouths are called ____________________.
 29.
____________________ are the simplest animals with bilateral symmetry.
 30.
Concentration of sense organs at the anterior end can be observed in flatworms and is called ____________________.
 31.
A planarian takes in food through the ____________________.
 32.
The ____________________ is a noncellular layer that protects a roundworm.
 33.
Being infected with ____________________ worms can cause a condition known as elephantiasis.
 

Essay
 34.
A planarian cannot eat when food is already in its gut. Why? Write your answer in the space below.


Check Your Work     Start Over

What’s Your Style

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What’s Your Learning Style

For these questions, choose the first answer that comes to mind and click on a, b, or c. Don’t spend too much time thinking about any one question.

Question 1
    1. When you study for a test, would you rather

      1. a) read notes, read headings in a book, and look at diagrams and illustrations.

      1. b) have someone ask you questions, or repeat facts silently to yourself.

    1. c) write things out on index cards and make models or diagrams.
Question 2
    1. Which of these do you do when you listen to music?

      1. a) daydream (see things that go with the music)

      1. b) hum along

    1. c) move with the music, tap your foot, etc.
Question 3
    1. When you work at solving a problem do you

      1. a) make a list, organize the steps, and check them off as they are done

      1. b) make a few phone calls and talk to friends or experts

    1. c) make a model of the problem or walk through all the steps in your mind
Question 4
    1. When you read for fun, do you prefer

      1. a) a travel book with a lot of pictures in it

      1. b) a mystery book with a lot of conversation in it

    1. c) a book where you answer questions and solve problems
Question 5
    1. To learn how a computer works, would you rather

      1. a) watch a movie about it

      1. b) listen to someone explain it

    1. c) take the computer apart and try to figure it out for yourself
Question 6
    1. You have just entered a science museum, what will you do first?

      1. a) look around and find a map showing the locations of the various exhibits

      1. b) talk to a museum guide and ask about exhibits

    1. c) go into the first exhibit that looks interesting, and read directions later
Question 7
    1. What kind of restaurant would you rather not go to?

      1. a) one with the lights too bright

      1. b) one with the music too loud

    1. c) one with uncomfortable chairs
Question 8
    1. Would you rather go to

      1. a) an art class

      1. b) a music class

    1. c) an exercise class
Question 9
    1. Which are you most likely to do when you are happy?

      1. a) grin

      1. b) shout with joy

    1. c) jump for joy
Question 10
    1. If you were at a party, what would you be most likely to remember the next day?

      1. a) the faces of the people there, but not the names

      1. b) the names but not the faces

    1. c) the things you did and said while you were there
Question 11
    1. When you see the word “d – o – g”, what do you do first?

      1. a) think of a picture of a particular dog

      1. b) say the word “dog” to yourself silently

    1. c) sense the feeling of being with a dog (petting it, running with it, etc.)
Question 12
    1. When you tell a story, would you rather

      1. a) write it

      1. b) tell it out loud

    1. c) act it out
Question 13
    1. What is most distracting for you when you are trying to concentrate?

      1. a) visual distractions

      1. b) noises

    1. c) other sensations like, hunger, tight shoes, or worry
Question 14
    1. What are you most likely to do when you are angry?

      1. a) scowl

      1. b) shout or “blow up”

    1. c) stomp off and slam doors
Question 15
    1. When you aren’t sure how to spell a word, which of these are you most likely to do?

      1. a) write it out to see if it looks right

      1. b) sound it out

    1. c) write it out to see if it feels right
Question 16
    1. Which are you most likely to do when standing in a long line at the movies?

      1. a) look at posters advertising other movies

      1. b) talk to the person next to you

    1. c) tap your foot or move around in some other way

Total your a’s, b’s, and c’s

 

Quiz – Biochemistry

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Biochemistry Quiz
1. All of the following are carbohydrates EXCEPT:
starch
glycogen
chitin
cholesterol2. The structure contains which functional group
aldehyde
ketone
amino
carboxyl

3. Fatty acids that are unsaturated have:
an amino group
a double bond
an excess of protons
a carboxyl group

4. The structure below is a:


monosaccharide
disaccharide
lipid
polymer

5. Which of the following can have a quaternary structure?
fatty acid
protein
polysaccharide
DNA

6. An organic compound is one that:
contains carbon
is slightly acidic
forms long chains
is soluble in water

7. Which of the following elements is the LEAST abundant in living organisms?
oxygen
nitrogen
phosphorous
sodium

8. Which of the following is used in PET scans?
uranium
ions
isotopes
steroids

9. Carbon can form ___ separate bonds with other elements?
1
2
3
4

10. The cohesion of water is caused by:
ionic bonds
hydrophobic compounds
hydrogen bonds
covalent bonds

Score =
Correct answers:

 

 

 

Diffusion Across Membranes: A Short Formative Assessment

Cells and Transport Teaching Resources · High school biology; AP extensions where noted.

Use these original questions after teaching diffusion, membrane permeability, and tonicity. They replace an obsolete interactive quiz with a readable assessment that needs no plugin. Students should explain a prediction before looking at the feedback.

Objectives and setup

Students will distinguish movement from net movement, identify missing information, and classify a transport mechanism. Materials: notebook or a printed copy of the questions. Allow a short independent response followed by discussion; this is a formative check, not a complete unit test.

Student questions

  1. Compartments A and B contain the same gas at 40% and 20%, respectively, under otherwise comparable conditions. An open connection allows the gas to move. Describe molecular movement in both directions and the initial net direction.
  2. A molecule has a higher concentration outside a cell. Is that enough information to conclude it will diffuse through the cell membrane? Explain what is missing.
  3. An animal cell contains 0.20 M nonpenetrating solute and is placed in 0.35 M nonpenetrating solute. The membrane permits water to cross, and initial pressures are equal. Predict its initial water movement and volume change.
  4. A membrane protein carries a substance downhill along its relevant gradient without energy coupling. Is the process necessarily active? Name a suitable mechanism.
  5. A pump moves an ion against its electrochemical gradient using ATP. Explain what distinguishes this from a passive channel.
  6. At equilibrium, a student draws no arrows across a permeable membrane. What should change in the drawing?

Answer explanations

  1. Gas molecules move both A→B and B→A. The initial net movement is A→B; it is incorrect to say all molecules move one way.
  2. Permeability is missing. A gradient alone does not make a membrane permeable. For ions, electrical conditions also influence the net direction.
  3. Water initially moves net out and the cell tends to shrink. The external solution is hypertonic relative to this cell under the given assumptions.
  4. No. This description fits facilitated diffusion. Proteins participate in both passive and active mechanisms.
  5. The pump couples an energy input to uphill transport. An open passive channel permits downhill movement and does not maintain that uphill transfer by itself.
  6. Draw arrows in both directions with equal overall rates. Zero net movement is not zero molecular motion.

Teaching notes

Ask students to name the moving substance and permeability assumption before grading the direction. If a student answers “salt water shrinks cells,” ask what the salt concentration is relative to the cell: the phrase alone is underspecified. Score one point for a supported prediction and one for reasoning on each question. Use patterns of error to select the next lesson rather than treat the score as a comprehensive achievement measure.

AP extension: Revisit Question 2 with an ion. Ask how an electrical gradient could reinforce or oppose the concentration gradient, and what measurements would resolve the prediction.

Continue the unit

Sources and further reading