BIO 102-PRACTICE EXAM QUESTIONS
AND ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED A+
Which one of the following tends to reduce differences between populations
over time by transferring the alleles?
Answer: Gene flow.
Genes that are present in more than one copy within a species are called
____________ genes.
Answer: Paralogous genes.
According to fossil evidence, horses evolved from a dog-like creature about
how many years ago?
Answer: 60 million years ago.
The first genes on Earth were probably what?
Answer: Auto-catalytic RNA molecules.
The time required for 50% of the parent isotope to decay is called the
___________ of the isotope.
Answer: Half-life.
What describes the event when a few individuals become isolated from a
larger population?
Answer: Founder effect.
, When we say that an individual organism has a greater fitness than another
individual, we specifically mean that the organism:
Answer: Leaves more viable, fertile offspring than others of its species.
Seasonal differences (spring vs fall) that prevent successful mating falls under the
category of ? -ANSWER✔✔temporal isolation
Gene flow has the potential to increase the fitness of a population and also to
decrease it . -ANSWER✔✔true
During drought years on the Galapagos island, small seeds become rare, leaving
mostly large hard-cased seeds that only birds with large beaks could eat. If such a
drought persisted further, what should one expect to result from natural selection? -
ANSWER✔✔The offsprings produced in subsequent generations to have a higher
percentage of birds with large beaks
Mitochondria & Chloroplast reproduces in a fashion very similar to binary fission.
-ANSWER✔✔true
When an organism transfers genetic information to another organism rather than its
offspring, it is referred as a _______________. -ANSWER✔✔horizontal gene
transfer
If instead of a "tree of life", one were to believe that life evolved as a "ring of
Life", then eukaryotes would have been formed from ___________________
between a bacteria and an archaea. -ANSWER✔✔endosymbiosis
The tree of life is based on sequences of Ribosomal RNA (rRNA) genes because
they evolved
AND ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED A+
Which one of the following tends to reduce differences between populations
over time by transferring the alleles?
Answer: Gene flow.
Genes that are present in more than one copy within a species are called
____________ genes.
Answer: Paralogous genes.
According to fossil evidence, horses evolved from a dog-like creature about
how many years ago?
Answer: 60 million years ago.
The first genes on Earth were probably what?
Answer: Auto-catalytic RNA molecules.
The time required for 50% of the parent isotope to decay is called the
___________ of the isotope.
Answer: Half-life.
What describes the event when a few individuals become isolated from a
larger population?
Answer: Founder effect.
, When we say that an individual organism has a greater fitness than another
individual, we specifically mean that the organism:
Answer: Leaves more viable, fertile offspring than others of its species.
Seasonal differences (spring vs fall) that prevent successful mating falls under the
category of ? -ANSWER✔✔temporal isolation
Gene flow has the potential to increase the fitness of a population and also to
decrease it . -ANSWER✔✔true
During drought years on the Galapagos island, small seeds become rare, leaving
mostly large hard-cased seeds that only birds with large beaks could eat. If such a
drought persisted further, what should one expect to result from natural selection? -
ANSWER✔✔The offsprings produced in subsequent generations to have a higher
percentage of birds with large beaks
Mitochondria & Chloroplast reproduces in a fashion very similar to binary fission.
-ANSWER✔✔true
When an organism transfers genetic information to another organism rather than its
offspring, it is referred as a _______________. -ANSWER✔✔horizontal gene
transfer
If instead of a "tree of life", one were to believe that life evolved as a "ring of
Life", then eukaryotes would have been formed from ___________________
between a bacteria and an archaea. -ANSWER✔✔endosymbiosis
The tree of life is based on sequences of Ribosomal RNA (rRNA) genes because
they evolved
