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Biology Midterm Questions With Complete Solutions
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Biology Midterm Questions With Complete Solutions
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Biology Midterm Questions With Complete Solutions__________________________- any physical or behavioral
trait that helps an organism survive in an enviroment.
example: the stripes on a zebra are physical adaptions, while
herding together is a behavioral adaptions Correct Answer
adaptions
a hydrangea plant has blue flowers when grown in acidic soil,
but has pink flowers when grown in basic soil. a clone of the
pink-flowered plant is grown in acidic soil and produces blue
flowers. this change in flower color is most likely due to what?
Correct Answer genes being expressed in a different ways due
to enviromental conditions
A protein is a chain of _______________. Correct Answer
amino acids
a scientist observes several different fossils in a rock layer.
Based on this observation, which is the best conclusion?
A. the fossils are composed of lava that cooled around several
organisms
B. the fossils formed about the same time as the rock layer in
which they were found
C. the fossils formed after heat and pressure changed the type of
rock in the rock layer
D. the fossils are composed of the same material as the
organisms from which they formed Correct Answer B. the
,fossils formed about the same time as the rock layer in which
they were found
after a natural disaster, the population is reduced to a few
individuals. Variation is reduced as alleles are lost is an example
of ______________________________. Correct Answer
bottleneck effect
as time passes, the gene/allele frequency of a helpful trait will
____________________ while the frequency of less helpful or
hurtful varieties will ___________________ in the gene pool
Correct Answer 1. increase
2. decrease
bb is _____________________________. It is a
_______________________________, and it will show the
_________________________ trait. Correct Answer 1.
homozygous
2. genotype
3. recessive
Bb is ______________________. It is
___________________________, and it will show the
____________________________ trait. Correct Answer 1.
heterozygous
2. genotype
3. dominant
between which two stages is cell differentiation (or
specialization) occurring in the developing zygote?
, what is the name of that stage? Correct Answer 1. stage 6 and
stage 7
2. morula and gastrula
codons are triplets of nitrogenous bases on mRNA that code for
a specific _____________________________. Correct Answer
amino acids
cuts the number of chromosomes in half during divisions
Correct Answer meiosis
dark beetles migrate to an island and can no longer get back to
the mainland. geographically isolated leads to reproductive
isolated is an example of _______________________________.
Correct Answer founder effect
DNA and RNA carry instructions for making? Correct Answer
proteins
DNA has _______________ strands of nucleotides whereas
RNA has _______________ strands of nucleotides. Correct
Answer 1. two
2. one
do cells divide all the time? Correct Answer no
does all DNA code for proteins? Correct Answer yes
explain how the theory of evolution is supported by the walking
stick population, and predict how the walking stick population
would change over time if the lilac population was rapidly
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