John Smith had worked for the same company in the shipping and receiving department for 15 years. John was proud of his attendance record, and even though he wasn’t always giving his job 100%, he believed he was doing a good job. Everyone goofs off at work part of the time, don’t they?
One morning when John arrived at work, he stopped at the bulletin board where new job listings were posted. One of the postings was for a supervisor position in a department in which he had always wanted to work. The pay was a nice increase too, and with the extra money, he could have his truck with the new tires and rims customized. That night John filled out the necessary papers for the job and hurriedly turned them in the next day.
Weeks later, he and all the other employees that had applied, were called in for an interview. John just knew that he would land the job. However, when the person to fill the position was announced a few weeks later, another employee that had worked less time than John got the job. John was furious at being overlooked! That night when John clocked out and was getting into his car in the parking lot, he said, “I’ll get even with them for this.”
Tony Harris loved the outdoors and he loved photography, so many years ago when he relocated his family to a wetland area near a major river, he put his two “loves” together and started doing outdoor photography. Some of Tony’s photographs had even been published in several naturalist journals. Tony was very familiar with the wetland area and the wildlife because he spent most of his free time photographing there.
Tony had set out very early on a cool, crisp morning to spend the weekend camping and taking pictures at his favorite wetland area. Tony was excited about his trip and the great pictures he expected to get so when he came across the cove with its terrible stench, Tony was unprepared for what he found. In a tree-surrounded cove of the river, Tony found several dead waterfowl and turtles that had washed ashore. When he examined them, there weren’t any markings to show injuries, and the animals appeared to have been healthy when they died. Tony took several pictures of the area and the dead animals and decided to call the Game and Fish Commission when he returned home.
A new hunting season had opened and with it came lots of calls about poaching problems and hunting accidents. Chelsea Brown had worked for the Game and Fish for several years since her graduation from college. She had been raised to love animals and the environment so this job was great for her. Today she was spending time in the office to catch up on some reports and to answer the hotline. She was in a very relaxed mood when the phone hotline rang, and she took a call from a Mr. Tony Harris. She remembered Mr. Harris from an awards banquet when the Game and Fish Commission gave Tony an award for some of his outstanding waterfowl photographs that they had published in their G & F magazine.
Tony reported the incident with the dead waterfowl and turtles he had witnessed in the cove and said he would send the photographs of the area and the dead animals to the Game and Fish. Chelsea thanked Mr. Harris and told him she would make a report. The call didn’t seem to be too serious to Chelsea at the time. However, when Chelsea went to the G & F logbook to register the incident, she found numerous other reports called in from other hunters and campers stating that they had noticed a lot of unexplained deaths in the waterfowl and turtle populations in this area of the wetlands. This couldn’t be ignored. Chelsea said, “Guess we better get some people out there to check on this.”
When the Game and Fish officers traveled to the wetlands, they found more than just dead wildlife. The scene they discovered might be the cause of the reported deaths of wildlife in this aquatic habitat. Near the area of several of the reported hotline sightings, the officers found a large amount of industrial waste that had been dumped. The waste included large piles of discarded plastics, metals, and wood. A first inspection of the wastes didn’t give the officers a clue where the trash came from or who had left it there. However, there were several deep tire tracks and shoe prints from a man’s athletic shoe in places where the ground had been extremely wet at one time. Like many areas of the wetlands with clay-based soils, when the water had receded from this area, the tracks and the ground dried hard like cement.
There was a possibility that the waste could have a negative effect on the environment and the animals in the area. The EPA, Environmental Protection Agency, would have to be called to help identify the unknown plastics, metals, etc. and to determine if they were or were not hazardous. The officers closed off the area and the investigation began!
STUDENT ROLE
As a student, you will be a scientist on the team that the EPA sent to the wetland area to study the dump site and its effect. You will work along with the people from the Game and Fish to solve three problems —
1. What type of plastics and metal are dumped at the site?
2. Could any of the plastics or metals cause death like the waterfowl and turtles?
3. Who is responsible for the illegal dumping and subsequent clean-up and damages?
EXTENSION:
Devise a plan for a safe method of disposal for the trash found at the dump site? and an estimated cost for removal and damages.
Cells within ' + 'a tissue carry out a common function.
'; answerText[3] = '
T
'; numberText[4] = '5.'; questionText[4] = '
The ribosome ' + 'is the site of protein synthesis within a cell.
'; answerText[4] = '
T
'; numberText[5] = '6.'; questionText[5] = '
A unicellular ' + 'organism is at a disadvantage when compared to a multicellular organism because a unicellular ' + 'organism is unable to perform all life functions that a multicellular organism can.
'; answerText[5] = '
F
'; numberText[6] = '7.'; questionText[6] = '
Cell membranes ' + 'are totally permeable.
'; answerText[6] = '
F
'; numberText[7] = '8.'; questionText[7] = '
As a cell gets ' + 'larger, its volume increases at a faster rate than its surface area.
'; answerText[7] = '
T
'; numberText[8] = '9.'; questionText[8] = '
ATP is produced ' + 'primarily in mitochondria.
'; answerText[8] = '
T
'; numberText[9] = '10.'; questionText[9] = '
The only difference ' + 'between a plant cell and an animal cell is that plant cells have chloroplasts.
'; answerText[9] = '
F
'; numberText[10] = '11.'; questionText[10] = '
Which of the ' + 'following is not a function both multicellular and unicellular organisms can ' + 'perform?
a.
coordinate the activities of organs
c.
produce other cells
b.
synthesize new living material
d.
regulate water balance
'; answerText[10] = '
A
'; numberText[11] = '12.'; questionText[11] = '
Structures that support and give shape to cells are
a.
Golgi bodies
c.
basal bodies
b.
microtubules
d.
chloroplasts
'; answerText[11] = '
B
'; numberText[12] = '13.'; questionText[12] = '
Which of the ' + 'following functions are performed by both multicellular and unicellular organisms?
a.
regulating water balance
c.
producing other cells
b.
reacting to changes in the environment
d.
all of these
'; answerText[12] = '
D
'; numberText[13] = '14.'; questionText[13] = '
What structures ' + 'are associated with cell division?
a.
mitochondria
c.
Golgi bodies
b.
chloroplasts
d.
centrioles
'; answerText[13] = '
D
'; numberText[14] = '15.'; questionText[14] = '
A complex network ' + 'of membranes lying between the nuclear membrane and the cell membrane is
the
a.
mitochondria
c.
cristae
b.
chromosomes
d.
endoplasmic ' + 'reticulum
'; answerText[14] = '
D
'; numberText[15] = '16.'; questionText[15] = '
A particularly ' + 'active cell might contain large amounts of
a.
chromosomes.
c.
mitochondria.
b.
vacuoles.
d.
walls.
'; answerText[15] = '
C
'; numberText[16] = '17.'; questionText[16] = '
The cell membrane
a.
allows all substances to pass into and out of the ' + 'cell
c.
is composed mainly of a protein ' + 'bilayer
b.
prevents all ' + 'substances from passing into and out of the cell
d.
is composed mainly of a lipid bilayer
'; answerText[16] = '
D
'; numberText[17] = '18.'; questionText[17] = '
Sometimes these organelles are attached to the endoplasmic reticulum to form rough ' + 'ER
a.
chloroplasts
c.
mitochondria
b.
ribosomes
d.
centrioles
'; answerText[17] = '
B
'; numberText[18] = '19.'; questionText[18] = '
One difference ' + 'between prokaryotes and eukaryotes is that
a.
nucleic acids are found only in prokaryotes.
b.
mitochondria are found in larger quantities in ' + 'eukaryotes.
c.
Golgi vesicles are ' + 'found only in prokaryotes.
d.
prokaryotes have no nuclear membrane.
'; answerText[18] = '
D
'; numberText[19] = '20.'; questionText[19] = '
Cigar-shaped bodies in the cytoplasm known as centers of ATP production ' + 'are
a.
Golgi bodies
c.
ribosomes
b.
mitochondria
d.
chloroplasts
'; answerText[19] = '
B
'; numberText[20] = '21.'; questionText[20] = '
Which of the ' + 'following cells would probably contain the greatest number of mitochondria
a.
stomach cells
c.
bone cells
b.
muscle cells
d.
red blood cells
'; answerText[20] = '
B
'; numberText[21] = '22.'; questionText[21] = '
Any cell component ' + 'that performs specific functions is called:
a.
an organelle
c.
a eukaryote
b.
a nucleus
d.
a microorganism
'; answerText[21] = '
A
'; numberText[22] = '23.'; questionText[22] = '
Hooke’s discovery of cells was made observing
a.
living algal cells.
c.
dead plant cells.
b.
living human blood cells.
d.
dead protist cells.
'; answerText[22] = '
C
'; numberText[23] = '24.'; questionText[23] = '
When the volume ' + 'of a cell increases, its surface area
a.
increases at the same rate.
c.
increases at a faster rate.
b.
remains the same.
d.
increases at a slower rate.
'; answerText[23] = '
D
'; numberText[24] = '25.'; questionText[24] = '
Cells that ' + 'have a high energy requirement generally have many
a.
nuclei
c.
mitochondria ' + '
b.
flagella
d.
microfillaments
'; answerText[24] = '
C
'; numberText[25] = '26.'; questionText[25] = '
Which organelles ' + 'are a pathway for transport of materials
a.
endoplasmic reticulum
c.
mitochondria
b.
ribosomes
d.
Golgi bodies
'; answerText[25] = '
A
'; numberText[26] = '27.'; questionText[26] = '
Which organelle ' + 'selectively destroys tissue to shape the bodies of animals during early
development?
a.
lysosome
c.
cell membrane
b.
mitochondria
d.
ribosome
'; answerText[26] = '
A
'; numberText[27] = '28.'; questionText[27] = '
The ends of ' + 'this structure pinch off to form lysosomes
a.
endoplasmic reticulum
c.
Golgi bodies
b.
mitochondria
d.
centrioles
'; answerText[27] = '
C
'; numberText[28] = '29.'; questionText[28] = '
A cell that ' + 'can change its shape would be well suited for
a.
receiving and transmitting nerve impulses.
b.
covering the body surface.
c.
moving to different tissues through narrow ' + 'openings.
d.
All of the ' + 'above
'; answerText[28] = '
C
'; numberText[29] = '30.'; questionText[29] = '
Which organelles ' + 'store cellular secretions?
a.
endoplasmic reticulum
c.
Golgi bodies
b.
ribosomes
d.
centrioles
'; answerText[29] = '
C
'; numberText[30] = '31.'; questionText[30] = '
Which of the ' + 'following is not a specialized activity found in cells of Volvox (green algae) ' + 'colonies?
a.
photosynthesis
c.
movement
b.
transmission of messages
d.
reproduction
'; answerText[30] = '
B
'; numberText[31] = '32.'; questionText[31] = '
Ribosomes are
a.
surrounded by a double membrane
c.
composed of proteins and RNA
b.
manufactured in the cytosol
d.
attached to the smooth endoplasmic reticulum
'; answerText[31] = '
C
'; numberText[32] = '33.'; questionText[32] = '
Lysosomes function in cells to
a.
recycle cell parts
c.
shape developing body parts
b.
destroy viruses and bacteria
d.
all of the above
'; answerText[32] = '
D
'; numberText[33] = '34.'; questionText[33] = '
An example ' + 'of a prokaryotic cell is a(n)
a.
animal cell.
c.
bacterium.
b.
tree cell.
d.
"animalcule."
'; answerText[33] = '
C
'; numberText[34] = '35.'; questionText[34] = '
Which of the ' + 'following associations between a type of animal tissue and its primary function is ' + 'incorrect?
a.
connective tissue—transport of substances around the ' + 'body
"); document.writeln(""); document.writeln(""); document.close(); return(false); } function GetResponse(answerIndex, answer) { var listIndex; var responseText; if (listMap.charAt(answerIndex) == "1") { listIndex = answer.selectedIndex; responseText = answer.options[listIndex].text; } else responseText = answer.value; return(responseText); } function ScoreAnswer(answerIndex, responseText) { var listIndex; var answerText; answerText = ansMap[answerIndex]; if (qtypeMap.charAt(answerIndex) == "4") return(NumericCompare(responseText, answerText)); else if (qtypeMap.charAt(answerIndex) == "5") return(MultiCompare(responseText, answerText)); else if (responseText.toUpperCase() == answerText.toUpperCase()) return(true); else return(false); } function BuildPrefixText(answerIndex, responseText, isCorrect) { var text; var listIndex; text = "
" if (isCorrect) text += "" else text += "" if (listMap.charAt(answerIndex) == "1") { if (responseText.length == 0) responseText = " "; text += " " + responseText + " "; } text += "
" return(text); } function StripSpaces(s) { var len; var i; len = s.length; for (i=len - 1; i >= 0 && s.charAt(i) == " "; --i) len = i; if (len == 0) s = ""; else if (len != s.length) s = s.substring(0, len); return(s); } function TranslateHtmlString(text) { var newText; var replaceString; var position; var length; var breakPos; var skipExtra; var i; newText = ""; position = 0; length = text.length; while (position < length) { skipExtra = 0; breakPos = -1; for (i=position; i < length && breakPos < 0; ++i) { switch(text.charAt(i)) { case '>': replaceString = ">"; breakPos = i; break; case '<': replaceString = "<"; breakPos = i; break; case '&': replaceString = "&"; breakPos = i; break; case 'r': if ((i + 1) < length && text.charAt(i + 1) == 'n') skipExtra = 1; replaceString = " "; breakPos = i; break; case 'n': replaceString = " "; breakPos = i; break; case ' ': if ((i + 1 < length) && text.charAt(i + 1) == ' ') { replaceString = " "; breakPos = i; } break; } } if (breakPos < 0) { newText += text.substring(position, length); position = length; } else { if (breakPos > position) newText += text.substring(position, breakPos); newText += replaceString; position = breakPos + 1 + skipExtra; } } return(newText); } function FixMCNotes(notesText, studentText) { var displayText; var searchText; var upperNotes; var charCode; var startIndex; var endIndex; displayText = ""; if (studentText.length > 0 && notesText.length > 0) { upperNotes = notesText.toUpperCase(); studentText = studentText.toUpperCase(); charCode = studentText.charCodeAt(0); searchText = "/" + String.fromCharCode(charCode) + "/"; startIndex = upperNotes.indexOf(searchText); if (startIndex >= 0) { startIndex += searchText.length; searchText = "/" + String.fromCharCode(charCode + 1) + "/"; endIndex = upperNotes.indexOf(searchText, startIndex); if (endIndex < startIndex) endIndex = notesText.length; displayText = notesText.substring(startIndex, endIndex); } else if (notesText.charAt(0) != "/") displayText = notesText; } return(displayText); } function NumericCompare(s1, s2) { var s1Sign; var s2Sign; var tempString; var decimalCount; var decimalPos; var numToDelete; var len; var ch; var i; s1.toUpperCase(); s2.toUpperCase(); if (s1 == s2) return(true); else { s1Sign = 1; s2Sign = 1; tempString = ""; for (i=0; i < s1.length; ++i) { ch = s1.charAt(i); if (ch == "-" && tempString.length == 0) s1Sign = -1; else if ((ch >= "0" && ch <= "9") || ch == ".") tempString += ch; } s1 = tempString; decimalCount = 0; decimalPos = -1; for (i=0; i < s1.length; ++i) { if (s1.charAt(i) == '.') { ++decimalCount; if (decimalPos < 0) decimalPos = i; } } if (decimalCount == 1 && decimalPos >= 0) { len = s1.length; for (i=len - 1; i >= decimalPos; --i) { if (i == decimalPos || s1.charAt(i) == '0') len = i; else break; } if (len < s1.length) s1 = s1.substring(0, len); if (s1.length == 0) s1 = "0"; } numToDelete = 0; for (i=0; i < s1.length; ++i) { if (s1.charAt(i) == "0") ++numToDelete; else break; } if (numToDelete > 0) { if (numToDelete == s1.length) --numToDelete; if (numToDelete > 0) s1 = s1.substring(numToDelete); } ///////////////////////////////////////////// tempString = ""; for (i=0; i < s2.length; ++i) { ch = s2.charAt(i); if (ch == "-" && tempString.length == 0) s2Sign = -1; else if ((ch >= "0" && ch <= "9") || ch == ".") tempString += ch; } s2 = tempString; decimalCount = 0; decimalPos = -1; for (i=0; i < s2.length; ++i) { if (s2.charAt(i) == '.') { ++decimalCount; if (decimalPos < 0) decimalPos = i; } } if (decimalCount == 1 && decimalPos >= 0) { len = s2.length; for (i=len - 1; i >= decimalPos; --i) { if (i == decimalPos || s2.charAt(i) == '0') len = i; else break; } if (len < s2.length) s2 = s2.substring(0, len); if (s2.length == 0) s2 = "0"; } numToDelete = 0; for (i=0; i < s2.length; ++i) { if (s2.charAt(i) == "0") ++numToDelete; else break; } if (numToDelete > 0) { if (numToDelete == s2.length) --numToDelete; if (numToDelete > 0) s2 = s2.substring(numToDelete); } if (s1Sign == s2Sign && s1 == s2) return(true); } return(false); } function MultiCompare(responseText, answerText) { var startIndex; var endIndex; var partialText; responseText = responseText.toUpperCase(); answerText = answerText.toUpperCase(); startIndex = 0; do { endIndex = answerText.indexOf("r", startIndex); if (endIndex < 0) partialText = answerText.substring(startIndex); else partialText = answerText.substring(startIndex, endIndex); if (responseText == partialText) return(true); startIndex = endIndex + 1; } while (endIndex > 0); return(false); } function FixMTF(f) { var text; var letter; var theList; var listIndex; var number; var i; for (i=0; i < f.length; ++i) { if (f.elements[i].name.indexOf("MTF:") == 0) { number = parseInt(f.elements[i].name.substring(4), 10); theList = f["MTF-" + number + "-1"]; if (theList) { listIndex = theList.selectedIndex; letter = theList.options[listIndex].text; } else letter = ""; text = StripSpaces(f["MTF-" + number + "-2"].value); if (text == "") f.elements[i].value = letter; else f.elements[i].value = letter + "," + text; } } } function AllowReset() { return(window.confirm("Do you want to clear all of your answers?")); } // -->
Name:
Cells & Organelles
True/False
Indicate whether the sentence or statement is true or false.
1.
Organelles enable eukaryotic cells to specialize.
2.
Chromatin carries a cell’s genetic information.
3.
Nucleoli produce the RNA of ribosomes
4.
Cells within a tissue carry out a common function.
5.
The ribosome is the site of protein synthesis within a cell.
6.
A unicellular organism is at a disadvantage when compared to a multicellular organism because a unicellular organism is unable to perform all life functions that a multicellular organism can.
7.
Cell membranes are totally permeable.
8.
As a cell gets larger, its volume increases at a faster rate than its surface area.
9.
ATP is produced primarily in mitochondria.
10.
The only difference between a plant cell and an animal cell is that plant cells have chloroplasts.
Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
11.
Which of the following is not a function both multicellular and unicellular organisms can perform?
a.
coordinate the activities of organs
c.
produce other cells
b.
synthesize new living material
d.
regulate water balance
12.
Structures that support and give shape to cells are
a.
Golgi bodies
c.
basal bodies
b.
microtubules
d.
chloroplasts
13.
Which of the following functions are performed by both multicellular and unicellular organisms?
a.
regulating water balance
c.
producing other cells
b.
reacting to changes in the environment
d.
all of these
14.
What structures are associated with cell division?
a.
mitochondria
c.
Golgi bodies
b.
chloroplasts
d.
centrioles
15.
A complex network of membranes lying between the nuclear membrane and the cell membrane is
the
a.
mitochondria
c.
cristae
b.
chromosomes
d.
endoplasmic reticulum
16.
A particularly active cell might contain large amounts of
a.
chromosomes.
c.
mitochondria.
b.
vacuoles.
d.
walls.
17.
The cell membrane
a.
allows all substances to pass into and out of the cell
c.
is composed mainly of a protein bilayer
b.
prevents all substances from passing into and out of the cell
d.
is composed mainly of a lipid bilayer
18.
Sometimes these organelles are attached to the endoplasmic reticulum to form rough ER
a.
chloroplasts
c.
mitochondria
b.
ribosomes
d.
centrioles
19.
One difference between prokaryotes and eukaryotes is that
a.
nucleic acids are found only in prokaryotes.
b.
mitochondria are found in larger quantities in eukaryotes.
c.
Golgi vesicles are found only in prokaryotes.
d.
prokaryotes have no nuclear membrane.
20.
Cigar-shaped bodies in the cytoplasm known as centers of ATP production are
a.
Golgi bodies
c.
ribosomes
b.
mitochondria
d.
chloroplasts
21.
Which of the following cells would probably contain the greatest number of mitochondria
a.
stomach cells
c.
bone cells
b.
muscle cells
d.
red blood cells
22.
Any cell component that performs specific functions is called:
a.
an organelle
c.
a eukaryote
b.
a nucleus
d.
a microorganism
23.
Hooke’s discovery of cells was made observing
a.
living algal cells.
c.
dead plant cells.
b.
living human blood cells.
d.
dead protist cells.
24.
When the volume of a cell increases, its surface area
a.
increases at the same rate.
c.
increases at a faster rate.
b.
remains the same.
d.
increases at a slower rate.
25.
Cells that have a high energy requirement generally have many
a.
nuclei
c.
mitochondria
b.
flagella
d.
microfillaments
26.
Which organelles are a pathway for transport of materials
a.
endoplasmic reticulum
c.
mitochondria
b.
ribosomes
d.
Golgi bodies
27.
Which organelle selectively destroys tissue to shape the bodies of animals during early
development?
a.
lysosome
c.
cell membrane
b.
mitochondria
d.
ribosome
28.
The ends of this structure pinch off to form lysosomes
a.
endoplasmic reticulum
c.
Golgi bodies
b.
mitochondria
d.
centrioles
29.
A cell that can change its shape would be well suited for
a.
receiving and transmitting nerve impulses.
b.
covering the body surface.
c.
moving to different tissues through narrow openings.
d.
All of the above
30.
Which organelles store cellular secretions?
a.
endoplasmic reticulum
c.
Golgi bodies
b.
ribosomes
d.
centrioles
31.
Which of the following is not a specialized activity found in cells of Volvox (green algae) colonies?
a.
photosynthesis
c.
movement
b.
transmission of messages
d.
reproduction
32.
Ribosomes are
a.
surrounded by a double membrane
c.
composed of proteins and RNA
b.
manufactured in the cytosol
d.
attached to the smooth endoplasmic reticulum
33.
Lysosomes function in cells to
a.
recycle cell parts
c.
shape developing body parts
b.
destroy viruses and bacteria
d.
all of the above
34.
An example of a prokaryotic cell is a(n)
a.
animal cell.
c.
bacterium.
b.
tree cell.
d.
“animalcule.”
35.
Which of the following associations between a type of animal tissue and its primary function is incorrect?
a.
connective tissue—transport of substances around the body
b.
epithelial tissue—protective surface coverings
c.
muscle tissue—contraction
d.
nervous tissue—receiving and transmitting messages
36.
Which of the following is not part of an animal cell?
a.
protoplasm
c.
cell wall
b.
nucleus
d.
cell membrane
37.
The organelles associated with photosynthesis are the
a.
mitochondria.
c.
Golgi apparatus.
b.
chloroplasts.
d.
vacuoles.
38.
The cell theory states that
a.
Unicellular organisms are exceptions to the rule
b.
cells come from other cells
c.
cell membranes have a fluid mosaic structure
d.
A and B
39.
One early piece of evidence supporting the cell theory was the observation that
a.
only plants are composed of cells
c.
cells come from other cells
b.
only animals are composed of cells
d.
animal cells come from plant cells
40.
The semifluid that fills most of the cell outside the nucleus is called: