BIOLOGY 1108: LAB EXAM 1
QUESTIONS AND ANSWERS WITH
DETAILED SOLUTIONS – UPDATED
2026 VERSION GUARANTEED
SUCCESS
What is the primary purpose of a dichotomous key?
✔✔ A dichotomous key is a systematic tool used to categorize and identify
organisms that are unknown to the observer.
How is a dichotomous key typically structured?
✔✔ These keys are organized as a series of couplets, providing "either-or"
choices that narrow down the possibilities.
What are the three essential components of a successful couplet?
✔✔ Every couplet must feature clear, objective choices, include specific
measurements where applicable, and conclude with either a reference to
another step or the final name of the species.
How are viruses defined in a biological context?
✔✔ Viruses are classified as microscopic infectious particles rather than fully
living cells.
Virus: Genomic material -ANSWER✔✔1. DNA or RNA
2. Double stranded or single stranded.
3. Circular or linear.
, What covers the genomic material? -ANSWER✔✔Individuals capsid. Consists of
a couple different types of proteins.
Virus: envelope -ANSWER✔✔1. External to the capsid.
2. Consists of some host proteins
Virus: Glycoproteins -ANSWER✔✔1. Additional proteins
2. Attached to the envelop or capsid.
Virus: Behavior -ANSWER✔✔1. Intracellular obligate parasites
2. Move inside the host cell, hostile takeover cellular machinery.
Virus: Vaccines -ANSWER✔✔1. Inactive form of a virus
2. Train immune system, create antibodies that will recognize the virus.
3. Herd Immunity
Null hypothesis -ANSWER✔✔A statement of no effect. There is no difference in
the options.
Statistical analyses -ANSWER✔✔Evaluate the null (reject or fail to reject)
If P-value is .05 or less... -ANSWER✔✔Reject the null
If the P-value is greater than .05... -ANSWER✔✔Fail to reject. No conclusion.
QUESTIONS AND ANSWERS WITH
DETAILED SOLUTIONS – UPDATED
2026 VERSION GUARANTEED
SUCCESS
What is the primary purpose of a dichotomous key?
✔✔ A dichotomous key is a systematic tool used to categorize and identify
organisms that are unknown to the observer.
How is a dichotomous key typically structured?
✔✔ These keys are organized as a series of couplets, providing "either-or"
choices that narrow down the possibilities.
What are the three essential components of a successful couplet?
✔✔ Every couplet must feature clear, objective choices, include specific
measurements where applicable, and conclude with either a reference to
another step or the final name of the species.
How are viruses defined in a biological context?
✔✔ Viruses are classified as microscopic infectious particles rather than fully
living cells.
Virus: Genomic material -ANSWER✔✔1. DNA or RNA
2. Double stranded or single stranded.
3. Circular or linear.
, What covers the genomic material? -ANSWER✔✔Individuals capsid. Consists of
a couple different types of proteins.
Virus: envelope -ANSWER✔✔1. External to the capsid.
2. Consists of some host proteins
Virus: Glycoproteins -ANSWER✔✔1. Additional proteins
2. Attached to the envelop or capsid.
Virus: Behavior -ANSWER✔✔1. Intracellular obligate parasites
2. Move inside the host cell, hostile takeover cellular machinery.
Virus: Vaccines -ANSWER✔✔1. Inactive form of a virus
2. Train immune system, create antibodies that will recognize the virus.
3. Herd Immunity
Null hypothesis -ANSWER✔✔A statement of no effect. There is no difference in
the options.
Statistical analyses -ANSWER✔✔Evaluate the null (reject or fail to reject)
If P-value is .05 or less... -ANSWER✔✔Reject the null
If the P-value is greater than .05... -ANSWER✔✔Fail to reject. No conclusion.
