1|Page
CCBC Bio 109 Lecture Exam 2, 2026 Actual Complete
Real Verified Exam Questions And Correct Answers
(Verified Answers) Already Graded A+ | Newest
Exam!!!
Mutation - Answer-- change in an individual's genes
- creates new variation in populations
Mutations arising in the ______________ will not be
passed on to offspring, but mutations in the
____________ will. - Answer-somatic cells; germ line
Take all the DNA from a single one of your cells, stretch it
out, and lie it end to end. How long will it be? - Answer-2 m
= ~6 ft
Take all the DNA from all of your cells, stretch them out,
and lay them end to end. About how long will it be? -
Answer-the diameter of Saturn's orbit
Since RNA has nucleotides, it should bind to: - Answer--
DNA
- other RNA
,2|Page
- itself
- other: in some special cases --> some proteins & amino
acids
What if an RNA molecule is not a perfect copy of the
DNA? - Answer-It doesn't matter - there are so many
copies made that some mistakes are okay
Genetic code implies neutral mutations are common. True
or false? - Answer-True. Genetic code is redundant and
has many synonyms, but mutations causing protein
changes is more common
Once it infects a cell, a retrovirus can hide undetected by
the immune system. True or false? - Answer-True.
Evolution is a chicken-and-egg problem: DNA, RNA,
proteins & membranes had to all arise and work together
at the same time. That's too improbable to have occurred
by itself. Agree or disagree? - Answer-Agree. It's too
improbable.
,3|Page
Natural selection began as soon as... - Answer-RNA
began to self-catalyze.
If you clone yourself, 100% of your genes [= allele copies]
will be present in the next generation.
But if by sexual reproduction you produce an offspring,
then out of all your allele copies, what fraction will be
present in the next generation? - Answer-50%
All other things being equal, which life cycle has higher
fitness? - Answer-One with parthenogenesis
How many sexually produced offspring must survive in
order for natural selection to favor sexual reproduction? -
Answer-Sexual:asexual ration > 2:1
When the environment is stable and favorable, you
should... - Answer-clone yourself!
As environmental quality gets less predictable, you should
try to have... - Answer-- genetically more variable offspring
- offspring with proven genes
, 4|Page
What's the best way to make more variable offspring? -
Answer-Produce mutant offspring
Sexual selection is a specific category of natural selection.
True or false? - Answer-True.
Universal difference between males and females? -
Answer-Females make larger gametes
Under the gamete hypothesis, should males be choosy
about which females they mate with? - Answer-Not
particularly, except in unusual circumstances.
When mating, is it better for a hermaphrodite to act as a
female or as a male? - Answer-Male, because sperm is
cheaper to make than eggs and males expel less energy
to make the same amount of babies
Which is typically the LEAST OPTIMAL reproductive
strategy for MALES? - Answer-Devote all your energy to
your present mate and her offspring.
CCBC Bio 109 Lecture Exam 2, 2026 Actual Complete
Real Verified Exam Questions And Correct Answers
(Verified Answers) Already Graded A+ | Newest
Exam!!!
Mutation - Answer-- change in an individual's genes
- creates new variation in populations
Mutations arising in the ______________ will not be
passed on to offspring, but mutations in the
____________ will. - Answer-somatic cells; germ line
Take all the DNA from a single one of your cells, stretch it
out, and lie it end to end. How long will it be? - Answer-2 m
= ~6 ft
Take all the DNA from all of your cells, stretch them out,
and lay them end to end. About how long will it be? -
Answer-the diameter of Saturn's orbit
Since RNA has nucleotides, it should bind to: - Answer--
DNA
- other RNA
,2|Page
- itself
- other: in some special cases --> some proteins & amino
acids
What if an RNA molecule is not a perfect copy of the
DNA? - Answer-It doesn't matter - there are so many
copies made that some mistakes are okay
Genetic code implies neutral mutations are common. True
or false? - Answer-True. Genetic code is redundant and
has many synonyms, but mutations causing protein
changes is more common
Once it infects a cell, a retrovirus can hide undetected by
the immune system. True or false? - Answer-True.
Evolution is a chicken-and-egg problem: DNA, RNA,
proteins & membranes had to all arise and work together
at the same time. That's too improbable to have occurred
by itself. Agree or disagree? - Answer-Agree. It's too
improbable.
,3|Page
Natural selection began as soon as... - Answer-RNA
began to self-catalyze.
If you clone yourself, 100% of your genes [= allele copies]
will be present in the next generation.
But if by sexual reproduction you produce an offspring,
then out of all your allele copies, what fraction will be
present in the next generation? - Answer-50%
All other things being equal, which life cycle has higher
fitness? - Answer-One with parthenogenesis
How many sexually produced offspring must survive in
order for natural selection to favor sexual reproduction? -
Answer-Sexual:asexual ration > 2:1
When the environment is stable and favorable, you
should... - Answer-clone yourself!
As environmental quality gets less predictable, you should
try to have... - Answer-- genetically more variable offspring
- offspring with proven genes
, 4|Page
What's the best way to make more variable offspring? -
Answer-Produce mutant offspring
Sexual selection is a specific category of natural selection.
True or false? - Answer-True.
Universal difference between males and females? -
Answer-Females make larger gametes
Under the gamete hypothesis, should males be choosy
about which females they mate with? - Answer-Not
particularly, except in unusual circumstances.
When mating, is it better for a hermaphrodite to act as a
female or as a male? - Answer-Male, because sperm is
cheaper to make than eggs and males expel less energy
to make the same amount of babies
Which is typically the LEAST OPTIMAL reproductive
strategy for MALES? - Answer-Devote all your energy to
your present mate and her offspring.
