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WGU- INTRO TO BIOLOGY C190 EXAM
QUESTIONS WITH ANSWERS
1. A SUBATOMIC PARTICLE HAS A NEGATIVE CHARGE AND IS FOUND IN A SHELL OF THE ATOM.
WHAT IS THE PARTICLE?: AN ELECTRON
2. MALE PEACOCKS COMPETE WITH ONE ANOTHER TO MATE FEMALE PEA- COCKS. 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?: SEXUAL SELECTION
3. 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?: MUTATION
4. 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 GRADI- ENT). Na+ IS PUMPED OUT AND K+ IS
PUMPED IN. WHICH TYPE OF MEMBRANE
TRANSPORT IS INVOLVED IN THIS ACTION?: ACTIVE TRANSPORT
5. 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?: DNA
6. A CELL HAS DIVIDED ITS CHROMOSOMES INTO WO NEW NUCLEI. THE CY- TOSKELETON OF
