Biology 148 Exam Solved Questions
With Revised Correct Detailed
Answers BRAND NEW VERSION!!
What characteristic is shared by all living organisms? - Answer- Use DNA to store
genetic information
Why viruses are not considered living? - Answer- They do not have cells
What do all cells contain? - Answer- Ribosomes
Why is the statement 'all organisms are multicellular' false? - Answer- Some organisms
consist of only one cell
What do prokaryotic cells lack? - Answer- A nucleus
What do eukaryotic cells have? - Answer- A nucleus and membrane-bound organelles
Which cells have mitochondria? - Answer- Eukaryotic cells
Which cells can have chloroplasts? - Answer- Some eukaryotic cells such as plants and
algae
What is evolution? - Answer- Change in inherited traits in a population over generations
In what does evolution occur? - Answer- Populations, not individuals
What is natural selection? - Answer- A mechanism that can cause evolution
What is the best measure of fitness? - Answer- Number of fertile offspring
Why is 'survival of the fittest' misleading? - Answer- Fitness refers to reproductive
success, not strength
Do organisms evolve because they need to? - Answer- False
Is evolution goal-directed? - Answer- False
Are traits acquired during life inherited? - Answer- False
Does environmental change directly cause mutations? - Answer- False
What is a heritable trait? - Answer- A trait that can be passed from parents to offspring
, What is required to demonstrate natural selection? - Answer- Variation, heritability, and
differential fitness
What does a parent-offspring trait graph show? - Answer- Heritability but not necessarily
natural selection
What is a clade? - Answer- A common ancestor and all of its descendants
What do more closely related organisms share? - Answer- A more recent common
ancestor
What do equally related organisms share? - Answer- The same most recent common
ancestor
What feature is not present in the last universal common ancestor? - Answer- A nucleus
What features are present in the last universal common ancestor? - Answer-
Ribosomes and DNA
What are the three domains of life? - Answer- Bacteria, Archaea, Eukarya
Which domain has a nucleus? - Answer- Eukarya
To which domain are Archaea most closely related? - Answer- Eukarya
What does the endosymbiotic theory explain? - Answer- The origin of mitochondria and
chloroplasts
From what did mitochondria evolve? - Answer- Ancient bacteria
From where is the mitochondrial inner membrane derived? - Answer- Bacterial plasma
membrane
Do protists form a clade? - Answer- False
To whom are animals most closely related? - Answer- Fungi
From whom did plants, animals, and fungi evolve? - Answer- Protist ancestors
What is the structure of DNA strands? - Answer- Antiparallel; one strand runs 5'→3' and
the other runs 3'→5'
What is a phosphodiester bond? - Answer- Covalent bond in the DNA sugar-phosphate
backbone
With Revised Correct Detailed
Answers BRAND NEW VERSION!!
What characteristic is shared by all living organisms? - Answer- Use DNA to store
genetic information
Why viruses are not considered living? - Answer- They do not have cells
What do all cells contain? - Answer- Ribosomes
Why is the statement 'all organisms are multicellular' false? - Answer- Some organisms
consist of only one cell
What do prokaryotic cells lack? - Answer- A nucleus
What do eukaryotic cells have? - Answer- A nucleus and membrane-bound organelles
Which cells have mitochondria? - Answer- Eukaryotic cells
Which cells can have chloroplasts? - Answer- Some eukaryotic cells such as plants and
algae
What is evolution? - Answer- Change in inherited traits in a population over generations
In what does evolution occur? - Answer- Populations, not individuals
What is natural selection? - Answer- A mechanism that can cause evolution
What is the best measure of fitness? - Answer- Number of fertile offspring
Why is 'survival of the fittest' misleading? - Answer- Fitness refers to reproductive
success, not strength
Do organisms evolve because they need to? - Answer- False
Is evolution goal-directed? - Answer- False
Are traits acquired during life inherited? - Answer- False
Does environmental change directly cause mutations? - Answer- False
What is a heritable trait? - Answer- A trait that can be passed from parents to offspring
, What is required to demonstrate natural selection? - Answer- Variation, heritability, and
differential fitness
What does a parent-offspring trait graph show? - Answer- Heritability but not necessarily
natural selection
What is a clade? - Answer- A common ancestor and all of its descendants
What do more closely related organisms share? - Answer- A more recent common
ancestor
What do equally related organisms share? - Answer- The same most recent common
ancestor
What feature is not present in the last universal common ancestor? - Answer- A nucleus
What features are present in the last universal common ancestor? - Answer-
Ribosomes and DNA
What are the three domains of life? - Answer- Bacteria, Archaea, Eukarya
Which domain has a nucleus? - Answer- Eukarya
To which domain are Archaea most closely related? - Answer- Eukarya
What does the endosymbiotic theory explain? - Answer- The origin of mitochondria and
chloroplasts
From what did mitochondria evolve? - Answer- Ancient bacteria
From where is the mitochondrial inner membrane derived? - Answer- Bacterial plasma
membrane
Do protists form a clade? - Answer- False
To whom are animals most closely related? - Answer- Fungi
From whom did plants, animals, and fungi evolve? - Answer- Protist ancestors
What is the structure of DNA strands? - Answer- Antiparallel; one strand runs 5'→3' and
the other runs 3'→5'
What is a phosphodiester bond? - Answer- Covalent bond in the DNA sugar-phosphate
backbone
