WGU C190 INTRO TO BIOLOGY EXAM
UPDATED EXAM SCRIPT WITH COMPLETE
ANSWERS
◉ MALE PEACOCKS COMPETE WITH ONE ANOTHER TO MATE
FEMALE PEACOCKS. MALES WITH MORE COLORFUL TAIL
FEATHERS ATTRACT FEMALE MATES AT A HIGHER RATE THAN
THOSE W/O. THEREFORE MALE PEACOCKS HAVE COLORFUL TAIL
FEATHERS, WHEREAS FEMALE PEACOCKS DO NOT. WHAT IS THIS
AN EXAMPLE OF?
Answer: SEXUAL SELECTION
◉ A GARDENER MAINTAINS A SPECIES OF ROSE THAT PRODUCD
EITHER YELLO FLOWERS ( THE DOMINANT PHENOTYPE) OR
WHITE FLOWERS ( THE RECESSIVE PHENOTYPE). ONE DAY, THE
GARDENER OBSERVES THAT A CROSS BETWEEN TWO YELLOW
ROSE BUSHES HAS LED TO A SINGLE ROSE BUSH WITH ORANGE
FLOWERS. WHAT EVOLUTIONARY MECHANISM IS INVOLVED IN
THE CHANGE IN THE GENE POOL OF THIS SPECIES?
Answer: MUTATION
◉ SOME CELLS NEED TO MAINTAIN A SET OF CENCENTRATIONS
OF Na+ AND K+ IONS. THESE CELLS ARE ABLE TO DO THIS WITH
THE HELP OF THE Na/K PUMP, WHICH TRANSPORTS THESE IONS
FROM AREAS OF LOW CONCENTRATION TO AREAS OF HIGH
,CONCETRATION ( AGAINST THEIR CONCENTRATION GRADIENT).
Na+ IS PUMPED OUT AND K+ IS PUMPED IN. WHICH TYPE OF
MEMBRANE TRANSPORT IS INVOLVED IN THIS ACTION?
Answer: ACTIVE TRANSPORT
◉ CHROMOSOMES ARE STRUCTURES THAT CONTAIN HEREDITARY
MATEIRAL THAT WILL BE PASSED FROM ONE GENERATION TO
THE NEXT. ACCORDING TO THIS INFORMATION, WHICH ORGANIC
MOLECULE MUST BE PRESENT IN CHROMOSOMES?
Answer: DNA
◉ A CELL HAS DIVIDED ITS CHROMOSOMES INTO WO NEW
NUCLEI. THE CYTOSKELETON OF THE CELL IS CURRENTLY
PINCHING THE CELL IN THE MIDDEL TO FROM TWO NEW CELLS.
IN WHICH STAGE OF THE CELL CYCLE IS THIS CELL?
Answer: CYTOKENESIS
◉ THERE ARE FOUR SPECIES OF WOODPECKERS THAT INHABIT
THE PINE FORESTS IN THE SOUTHEASTERN AREA OF THE U.S.
INDIVIDUALS OF THIS SPECIES UTILIZE MANY OF THE SAME
RESOURCES FOR FOOD AND NESTING. WHICH LEVEL OF
ECOLOGICAL ORGANIZATION DESCRIBES THE RELATIONSHIP
AMONG THESE FOUR SPECIES OF WOODEPECKER?
Answer: COMMUNITY
, ◉ TWO SPECIES OF WOODPECKER INHABIT THE SAME LOBLOLLY
PINE WOODLAND THROUGHOUT THE SOUTHEASTERN U.S. EACH
SPECIES REQUIRES RECENTLY DECEASED (BUT STILL STANDING)
PINE TREES FOR REPRODUCTION . THE WOODPECKERS EXCAVATE
THEIR NEST CAVITIES IN THE DEAD PINE TREES. IN MOST
HEALTHY FORESTS THERE ARE GENERALLY NOT ENOUGH DEAD
PINE TRESS TO PROVIDE NESTS FOR ALL THE WOODPECKERS
THAT WANT TO BUILD THEM. WHAT IS THE RELATIONSHIP
BETWEEN THESE TWO SPECIES OF WOODPECKER AN EXAMPLE
OF?
Answer: COMPETITION
◉ WHILE ABROAD, A TRAVELER DRINKS UNCLEAN WATER
CONTAINING TAPEWORM CYSTS. THE TAPEWORM ATTACHES TO
THE INTESTICAL WALLS OF THE TRAVELER, ABSORBING
NUTRIENTS FROM THE PARTIALLY DIGESTED FOOD. OVER THE
NEXT FEW MONTHS, THE TRAVELER EXPERIENCES ONGOING
NAUSEA, LOSS OF APPETITE, AND WEIGHT LOSS DUE TO THE
PRESENCE OF THE TAPEWORM IN HIS INTESTINES. WHAT IS THE
INTERACTION BETWEEN THE TAPEWORM AND THE TRAVELER
AND EXMPLE OF?
Answer: PARASITISM
◉ WHAT IS THE CHARGE OF A PROTON?
Answer: +1
UPDATED EXAM SCRIPT WITH COMPLETE
ANSWERS
◉ MALE PEACOCKS COMPETE WITH ONE ANOTHER TO MATE
FEMALE PEACOCKS. MALES WITH MORE COLORFUL TAIL
FEATHERS ATTRACT FEMALE MATES AT A HIGHER RATE THAN
THOSE W/O. THEREFORE MALE PEACOCKS HAVE COLORFUL TAIL
FEATHERS, WHEREAS FEMALE PEACOCKS DO NOT. WHAT IS THIS
AN EXAMPLE OF?
Answer: SEXUAL SELECTION
◉ A GARDENER MAINTAINS A SPECIES OF ROSE THAT PRODUCD
EITHER YELLO FLOWERS ( THE DOMINANT PHENOTYPE) OR
WHITE FLOWERS ( THE RECESSIVE PHENOTYPE). ONE DAY, THE
GARDENER OBSERVES THAT A CROSS BETWEEN TWO YELLOW
ROSE BUSHES HAS LED TO A SINGLE ROSE BUSH WITH ORANGE
FLOWERS. WHAT EVOLUTIONARY MECHANISM IS INVOLVED IN
THE CHANGE IN THE GENE POOL OF THIS SPECIES?
Answer: MUTATION
◉ SOME CELLS NEED TO MAINTAIN A SET OF CENCENTRATIONS
OF Na+ AND K+ IONS. THESE CELLS ARE ABLE TO DO THIS WITH
THE HELP OF THE Na/K PUMP, WHICH TRANSPORTS THESE IONS
FROM AREAS OF LOW CONCENTRATION TO AREAS OF HIGH
,CONCETRATION ( AGAINST THEIR CONCENTRATION GRADIENT).
Na+ IS PUMPED OUT AND K+ IS PUMPED IN. WHICH TYPE OF
MEMBRANE TRANSPORT IS INVOLVED IN THIS ACTION?
Answer: ACTIVE TRANSPORT
◉ CHROMOSOMES ARE STRUCTURES THAT CONTAIN HEREDITARY
MATEIRAL THAT WILL BE PASSED FROM ONE GENERATION TO
THE NEXT. ACCORDING TO THIS INFORMATION, WHICH ORGANIC
MOLECULE MUST BE PRESENT IN CHROMOSOMES?
Answer: DNA
◉ A CELL HAS DIVIDED ITS CHROMOSOMES INTO WO NEW
NUCLEI. THE CYTOSKELETON OF THE CELL IS CURRENTLY
PINCHING THE CELL IN THE MIDDEL TO FROM TWO NEW CELLS.
IN WHICH STAGE OF THE CELL CYCLE IS THIS CELL?
Answer: CYTOKENESIS
◉ THERE ARE FOUR SPECIES OF WOODPECKERS THAT INHABIT
THE PINE FORESTS IN THE SOUTHEASTERN AREA OF THE U.S.
INDIVIDUALS OF THIS SPECIES UTILIZE MANY OF THE SAME
RESOURCES FOR FOOD AND NESTING. WHICH LEVEL OF
ECOLOGICAL ORGANIZATION DESCRIBES THE RELATIONSHIP
AMONG THESE FOUR SPECIES OF WOODEPECKER?
Answer: COMMUNITY
, ◉ TWO SPECIES OF WOODPECKER INHABIT THE SAME LOBLOLLY
PINE WOODLAND THROUGHOUT THE SOUTHEASTERN U.S. EACH
SPECIES REQUIRES RECENTLY DECEASED (BUT STILL STANDING)
PINE TREES FOR REPRODUCTION . THE WOODPECKERS EXCAVATE
THEIR NEST CAVITIES IN THE DEAD PINE TREES. IN MOST
HEALTHY FORESTS THERE ARE GENERALLY NOT ENOUGH DEAD
PINE TRESS TO PROVIDE NESTS FOR ALL THE WOODPECKERS
THAT WANT TO BUILD THEM. WHAT IS THE RELATIONSHIP
BETWEEN THESE TWO SPECIES OF WOODPECKER AN EXAMPLE
OF?
Answer: COMPETITION
◉ WHILE ABROAD, A TRAVELER DRINKS UNCLEAN WATER
CONTAINING TAPEWORM CYSTS. THE TAPEWORM ATTACHES TO
THE INTESTICAL WALLS OF THE TRAVELER, ABSORBING
NUTRIENTS FROM THE PARTIALLY DIGESTED FOOD. OVER THE
NEXT FEW MONTHS, THE TRAVELER EXPERIENCES ONGOING
NAUSEA, LOSS OF APPETITE, AND WEIGHT LOSS DUE TO THE
PRESENCE OF THE TAPEWORM IN HIS INTESTINES. WHAT IS THE
INTERACTION BETWEEN THE TAPEWORM AND THE TRAVELER
AND EXMPLE OF?
Answer: PARASITISM
◉ WHAT IS THE CHARGE OF A PROTON?
Answer: +1
