WGU C190 INTRO TO BIOLOGY EXAM
QUESTIONS AND ANSWERS13
BIOTIC - ANSWERS-living things, such as plants, animals, fungi, and bacteria
ABIOTIC - ANSWERS-NON LIVING THINGS; physical rather than biological; not derived from
living organisms.
MUTUALISM - ANSWERS-BOTH SPECIES BENEFIT FROM RELATIONSHIP
PREDATION - ANSWERS-the preying of one animal on others.
COMPETITION - ANSWERS-the struggle between organisms to survive in a habitat with limited
resources
COMMENSALISM - ANSWERS-A relationship between two organisms in which one organism
benefits and the other is unaffected
PARASITISM - ANSWERS-One organism benefits and the other is harmed
SYMBYOTIC - ANSWERS-WHERE TWO ORGANISMS BENEFIT FROM THE RELATIONSHIP AND
NEITHER ARE HARMED
FOUNDATIONAL SPECIES - ANSWERS-a single species that creates the structure of the
ecosystem, usually dominant to the area
, KEYSTONE SPECIES - ANSWERS-INFLUENTIAL TO THE COMMUNITIES, BUT NOT ABUNDANT. HAS
A STRONG EFFECT ON THE STABILITY OF COMMUNITY
A SUBATOMIC PARTICLE HAS A NEGATIVE CHARGE AND IS FOUND IN A SHELL OF THE ATOM.
WHAT IS THE PARTICLE? - ANSWERS-AN ELECTRON
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? - ANSWERS-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? - ANSWERS-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? - ANSWERS-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? - ANSWERS-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? - ANSWERS-CYTOKENESIS
QUESTIONS AND ANSWERS13
BIOTIC - ANSWERS-living things, such as plants, animals, fungi, and bacteria
ABIOTIC - ANSWERS-NON LIVING THINGS; physical rather than biological; not derived from
living organisms.
MUTUALISM - ANSWERS-BOTH SPECIES BENEFIT FROM RELATIONSHIP
PREDATION - ANSWERS-the preying of one animal on others.
COMPETITION - ANSWERS-the struggle between organisms to survive in a habitat with limited
resources
COMMENSALISM - ANSWERS-A relationship between two organisms in which one organism
benefits and the other is unaffected
PARASITISM - ANSWERS-One organism benefits and the other is harmed
SYMBYOTIC - ANSWERS-WHERE TWO ORGANISMS BENEFIT FROM THE RELATIONSHIP AND
NEITHER ARE HARMED
FOUNDATIONAL SPECIES - ANSWERS-a single species that creates the structure of the
ecosystem, usually dominant to the area
, KEYSTONE SPECIES - ANSWERS-INFLUENTIAL TO THE COMMUNITIES, BUT NOT ABUNDANT. HAS
A STRONG EFFECT ON THE STABILITY OF COMMUNITY
A SUBATOMIC PARTICLE HAS A NEGATIVE CHARGE AND IS FOUND IN A SHELL OF THE ATOM.
WHAT IS THE PARTICLE? - ANSWERS-AN ELECTRON
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? - ANSWERS-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? - ANSWERS-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? - ANSWERS-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? - ANSWERS-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? - ANSWERS-CYTOKENESIS
