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Biology 150 Exams 1 questions and answers verified 2024
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Biology 150 Exams 1 questions and answers verified 2024
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Biology 150 Exams 1-4 Questions withcomplete solution (21 pgs)
What is the role of
inductive reasoning in scientific methods? - correct answer ✔Inductive
reasoning is used to develop generalizations and hypotheses about patterns
and
processes in the natural world
Which of the following best describes the logic of scientific inquiry? - correct
answer ✔If my hypothesis is correct, I can expect certain test results.
To answer questions about life, biologists use scientific methods, which
involve hypotheses, predictions, and experiments. Which statement most
accurately summarizes the relationship among these three elements? -
correct answer ✔A hypothesis is a proposed answer to a tightly focused
question; a prediction is a specific claim that follows from a hypothesis and
that can be tested.
If the results of an experiment are what were predicted by the hypothesis: -
correct answer ✔The hypothesis is supported
Technically scientific knowledge is always tentative because: - correct answer
✔Generalizations and hypotheses are derived inductively.
What is the characteristic of DNA and RNA molecules that allow them to carry
information? - correct answer ✔Base variability.
Mutations are: - correct answer ✔Changes in the sequence of DNA bases.
,A silent mutation is phenotypically "silent" because of: - correct answer ✔The
redundancy of the genetic code.
A missense mutation: - correct answer ✔Results in the substitution of a
different amino acid from that specified by the original codon.
The genetic code is essentially the same for all organisms. From this, one can
logically assume which of the following? - correct answer ✔All organisms are
descended from a common ancestor.
Which of the following is a true statement about sexual vs. asexual
reproduction? - correct answer ✔In sexual reproduction, individuals transmit
half of their nuclear genes to each of their offspring.
What is an outcome of sexual reproduction that is not an outcome of asexual
reproduction? - correct answer ✔Genetic recombination
Quaking aspen can send out underground stems for asexual reproduction.
Sexual reproduction is
not as common but when it does happen the gametes have 19 chromosomes.
How many chromosomes are in the cells of the underground stems? - correct
answer ✔38
At a basic level mitosis and meiosis are similar processes. However, they
have very different outcomes. Which of the following statements describes an
important outcome difference? - correct answer ✔Homologous
chromosomes are separated in meiosis but not in mitosis.
, What is another important difference between mitosis and meiosis? - correct
answer ✔Both B and C above are important differences. (Meiosis can only
occur in cells that are diploid (or have higher ploidy and Mitosis can occur in
haploid as well as diploid cells)
Always results in haploid daughter cells (meiosis mitosis or both) - correct
answer ✔Meiosis
Results in genetic clones (meiosis mitosis or both) - correct answer ✔Mitosis
Can result in haploid or diploid daughter cells (meiosis mitosis or both) -
correct answer ✔Meiosis
Involves separation of sister chromatids (meiosis mitosis or both) - correct
answer ✔Mitosis
Involves independent assortment of homologous chromosomes - correct
answer ✔Meiosis
Independent assortment of _____________ occurs in _____________. -
correct answer ✔homologous chromosomes / meiosis I
What is the physical basis of independent assortment? - correct answer
✔Homologous chromosomes are randomly separated during meiosis I.
Some cells have several nuclei per cell. How could such multinucleated cells
be explained? - correct answer ✔The cell underwent repeated mitosis, but
cytokinesis did not occur.
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