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1.Part E. When Darwin wrote On the Origin of Species, he knew very little about the subject of _____, an essential component of evolutionary theory today. - genetics 2. Part A. The evolution of populations due to chance is - genetic drift 2. Part B. If color is an inherited trait in beetles...

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EVR 1001 Exam 1 Study Guide - Chapter 3 Questions &
.

Answers.
1.Part E. When Darwin wrote On the Origin of Species, he knew very little about the subject
of _____, an essential component of evolutionary theory today. - ✅✅✅ genetics

2. Part A. The evolution of populations due to chance is - ✅✅✅ genetic drift

2. Part B. If color is an inherited trait in beetles, and birds are more likely to eat brown
beetles than green beetles, - ✅✅✅ the frequency of the green allele will increase.

2. Part C. In a population with brown and green alleles for color, genetic drift - ✅✅✅ has
more effect on the evolution of a small population.

2. Part D. Color is an inherited trait in beetles. If brown beetles move into a population from
a nearby island, which of the following statements is correct? - ✅✅✅ Gene flow causes
the frequency of the brown allele to increase.

1. Part A. Where are the Solomon Islands located? - ✅✅✅ in the South Pacific

1. Part B. Scientists studying evolution on the Solomon Islands described which animal as
the 'poster child' for the biological species concept? - ✅✅✅ white - eyed bird

1. Part C. Based on the video, what can you infer about speciation--the process by which
one species splits into two or more species? - ✅✅✅ Physical separation of populations is
often part of the speciation process.

1. Part D. Why did the biologists consider a frog that they found to be a new species? -
✅✅✅ its call was unique

1

2. Part E. Remember that color is an inherited trait in beetles. Which of the following is an
example of natural selection? - ✅✅✅ Green beetles leave more offspring than brown
beetles bc they are better at finding food

3. In the initial fly population prior to the isolation, it is safe to assume that ________. -
✅✅✅ the population is interfertile, i.e. any male could successfully mate with any female

4. In order for two organisms to belong to the same species, individuals of their species
must __________. - ✅✅✅ be able to reproduce and have fertile offspring

, 5. Which of the following is an example of selective breeding (artificial selection) by
humans? - ✅✅✅ the diversity of dog breeds in the world today

6. ___________ is the only process that can change a gene's DNA and therefore give rise
to new variations of the gene. - ✅✅✅ mutation

7. Which statement below most accurately describes a phylogenetic tree? - ✅✅✅ A
phylogenetic tree is a branching diagram used to illustrate a scientist's hypothesis about
how divergence took place among evolutionary lines.

8. The sixth mass extinction event is likely being caused by __________. - ✅✅✅ human
induced events

9. Which of the following populations would be most vulnerable to extinction? - ✅✅✅ a
small, endemic population

10. The arctic fox and gray fox evolved from the same species over thousands of years.
Can you place these steps in the process of allopatric speciation along the timeline? -
✅✅✅ look at snipping folder

11. Part A.Which of the following events could NOT be caused by a population bottleneck?
- ✅✅✅ increased population size

11. Part B.Which of the following statements about the amoeba population described at
the end of the tutorial is true? - ✅✅✅ It is more vulnerable to extinction due to lack of
genetic variation.

11. Part C.True or False. In the example described in the tutorial, the red amoebas
survived the catastrophic event, and all future generations of amoebas were red because
the red amoebas had a higher reproductive rate than the blue ones. - ✅✅✅ False

12. Drag the labels onto the flowchart to place them in the correct sequence. - ✅✅✅

13. The fossil record clearly shows that ________. - ✅✅✅ all species evolve from pre-
existing species

14. Heavy rains and mudslides cause a river to change course, isolating two groups of
lizards of the same species from one another. Over a long period of time ________. -
✅✅✅ the groups will probably diverge genetically, and speciation may occur.

15. In a population of field mice, an example of an adaptive trait that could help with
reproduction and/or survival would be ________. - ✅✅✅ having a bit more fur to
withstand cold weather

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