The most significant conclusion of the experiments on Heliconius butterfly mimics is that ________
A) evolution can sometimes happen by sudden jumps
B) genes can occasionally be transferred between completely unrelated organisms
C) natural selection is the only mechanism for evolutionary diversification
D) the same developmental genetic mechanisms underlie a great range of variants
E) development must be studied separately from evolutionary genetics
D
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Which of the following are sequence motifs?
A. open reading frame B. hairpin structures C. transcription factors D. coding region E. All of the answer options are correct.
An important message from the work of Thomas Malthus that influenced Charles Darwin was
A. animals tended toward "human perfection." B. only a fraction of any population will survive and reproduce. C. population size of humans can only increase linearly. D. inheritance of acquired characteristics. E. none of these. Charles Darwin was influenced by John Ray not Thomas Malthus.
In 2013, scientists in Europe discovered a new organelle in grapes that they named the tannosome. This discovery was the result of creative microscopy. If looking to discover a new organelle, which are located inside the cell, what kind of microscope must be used?
a. brightfield microscope b. scanning electron microscope c. transmission electron microscope d. compound light microscope.
Which of the following is an example of an
event that would set up the scene for primary succession?
a. a dense landslide of mountain rocks covering an entire valley b. a fire that burns off all of the surface vegetation c. an agricultural field that is abandoned d. a lake that dries up killing all of the aquatic plants e. all of these set the scene for secondary succession NOT primary succession