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BIO 250 EXAM 1 Actual test with accurate illustrations; newly updated

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This document contains the full set of verified questions and correct answers from the Bio 250 Exam 1. It covers foundational topics in anatomy, physiology, histology, development, and the skeletal and integumentary systems. The material is structured in question-and-answer format, making it ideal for students preparing for quizzes, midterms, and cumulative exams. It reflects the actual content tested in the course and provides a complete and reliable study resource.

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BIO 250 EXAM 1 ACTUAL TEST WITH
ACCURATE ILLUSTRATIONS; NEWLY UPDATED




5 mechanisms of evolution - correct answer- 1. mutation

2. migration

3. genetic drift

4. non random mating

5. natural selection



adaptation - correct answer- trait or characteristic of an organism
that increases fitness relative to organisms without the trait



Can bad genes (i.e. genes that result in phenotypes that poorly match
environment) make it through to subsequent generations? how? -
correct answer- some genes can compensate. For example, a short
guy that can jump!



Classification of disease - correct answer- -genetic causes

-environmental causes

-products of defense systems

-homeostasis problems

-lack of maintenance

,-stochastic developmental problems

-disease of pregnant (maternal-fetal conflict)



Coincidental hypothesis - correct answer- pathogen doesn't
normally live inside that host.

-some pathogens get into us but we are not their primary target

-ex: tetanus.

-this bacterium does not normally live in humans



Comparative anatomy - correct answer- Similarities between
different species can help us group them.

-example: vagus nerve 10. Silly structure. Goes underneath the heart.
This is because fish.



Darwin - correct answer- He asked big questions. How do I explain
the diversity of life? Is there a framework of the diversity of life?

-He wanted to know if there was unifying framework for all life on earth.

-is there a process that can account for all of the observed patterns of
the diversity of life on earth?



definition of fit or fitness - correct answer- the ability of an individual
to survive and reproduce in its environment. the extent to which an
individual passes on genes to subsequent generations.

, Difference between Joseph F Smith and Joseph Fielding Smith opinions
- correct answer- Joseph F Smith has a tone of anti-evolution.

-He gives 3 options for the origin of Adam's body.

-He says that BYU biologists should focus on pest control. So...anti-
evolution.



-Joseph Fielding Smith publishes book "Man His Origin and Destiny"

-He doesn't really say much when he is a prophet though

-he also isn't really into evolution



Evidence for extinction - correct answer- -in 1801, Cuvier publishes a
list of 23 species that were no longer in existence.

-lots of people didn't believe that extinction could happen. If God
created each species, why would a perfect God make them go extinct?



Evolution - correct answer- -genetically based change in population
properties over time

-it is a population level phenomenon. not an individual thing

-for evolution to happen, there must be genetic variation



Evolution of virulence (aka why do pathogens harm their hosts?) -
correct answer- 1. Tradeoff hypothesis

2. Coincidental hypothesis

3. Short-sighted hypothesis

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