Biology 1104 Exam Questions with
Correct Answers 2025
Assumption - CORRECT ANSWER -
They are philosophical, foundational starting points that cannot be proven.
Scientific Theory - CORRECT ANSWER -
A highly validated explanation for phenomena; applies to ALLDsystems
Hypothesis - CORRECT ANSWER -
A supposition about a specific system supported by initial observations.
Experimental group - CORRECT ANSWER -Group where the independent variable is changed.
What's the difference between natural selection and genetic drift? - CORRECT ANSWER -
Genetic drift is random. Changes in gene frequencies are NOT related to the gene's influence o
n reproductive success. Natural selection is not random. you can predict how allele frequencies
will change.
Observation - CORRECT ANSWER -Information obtained through the senses.
6 steps of the scientific method - CORRECT ANSWER -
Observation, question, hypothesis, prediction, experiment, conclusion
What's the difference between an observation and a hypothesis? - CORRECT ANSWER -
Observation-
The action or process of observing something or someone carefully or in order to gain informa
tion.
Hypothesis-
a proposed explanation made on the basis of limited evidence as a starting point for further in
vestigation
, What is the difference between a hypothesis and a scientific theory? - CORRECT ANSWER -
A hypothesis is an assumption made before any research has been done. It is formed so that it
can be tested to see if it might be true. A theory is a principle formed to explain the things alre
ady shown in data
Evolution - CORRECT ANSWER -
Any genetic change in a population. Evolution occurs in populations not in individuals.Evolution
≠ progress or adaptation
What are the 4 basic mechanisms that cause genetic change in populations? -
CORRECT ANSWER -Mutation, gene flow(migration), natural selection, genetic drift.
Population - CORRECT ANSWER -
Group of organisms of 1 species in the same area that can breed with one another.
Genetic change - CORRECT ANSWER -
Shift in the frequency of a gene(i.e. percentage of the population with that gene)
mutation - CORRECT ANSWER -
It is the ultimate source of variation. It is caused randomly by changes in DNA sequence• Its ca
used by occasional errors in copying DNA & exposure to ultraviolet light or specific chemicals
Gene flow - CORRECT ANSWER -
Is the exchange of genes between populations caused by migration.
genetic drift - CORRECT ANSWER -
Is a random change in gene frequencies. Not related to the advantage or disadvantage of traits
. Small populations are affected more than large populations. Can result in decreased diversity
and loss of alleles from a population (fixation).
Correct Answers 2025
Assumption - CORRECT ANSWER -
They are philosophical, foundational starting points that cannot be proven.
Scientific Theory - CORRECT ANSWER -
A highly validated explanation for phenomena; applies to ALLDsystems
Hypothesis - CORRECT ANSWER -
A supposition about a specific system supported by initial observations.
Experimental group - CORRECT ANSWER -Group where the independent variable is changed.
What's the difference between natural selection and genetic drift? - CORRECT ANSWER -
Genetic drift is random. Changes in gene frequencies are NOT related to the gene's influence o
n reproductive success. Natural selection is not random. you can predict how allele frequencies
will change.
Observation - CORRECT ANSWER -Information obtained through the senses.
6 steps of the scientific method - CORRECT ANSWER -
Observation, question, hypothesis, prediction, experiment, conclusion
What's the difference between an observation and a hypothesis? - CORRECT ANSWER -
Observation-
The action or process of observing something or someone carefully or in order to gain informa
tion.
Hypothesis-
a proposed explanation made on the basis of limited evidence as a starting point for further in
vestigation
, What is the difference between a hypothesis and a scientific theory? - CORRECT ANSWER -
A hypothesis is an assumption made before any research has been done. It is formed so that it
can be tested to see if it might be true. A theory is a principle formed to explain the things alre
ady shown in data
Evolution - CORRECT ANSWER -
Any genetic change in a population. Evolution occurs in populations not in individuals.Evolution
≠ progress or adaptation
What are the 4 basic mechanisms that cause genetic change in populations? -
CORRECT ANSWER -Mutation, gene flow(migration), natural selection, genetic drift.
Population - CORRECT ANSWER -
Group of organisms of 1 species in the same area that can breed with one another.
Genetic change - CORRECT ANSWER -
Shift in the frequency of a gene(i.e. percentage of the population with that gene)
mutation - CORRECT ANSWER -
It is the ultimate source of variation. It is caused randomly by changes in DNA sequence• Its ca
used by occasional errors in copying DNA & exposure to ultraviolet light or specific chemicals
Gene flow - CORRECT ANSWER -
Is the exchange of genes between populations caused by migration.
genetic drift - CORRECT ANSWER -
Is a random change in gene frequencies. Not related to the advantage or disadvantage of traits
. Small populations are affected more than large populations. Can result in decreased diversity
and loss of alleles from a population (fixation).
