Biology 151 Exam A+ Pass 2025 New
Update Brand New
If all cells come from other cells, where did the first cells come from? - Answer ✔✔-
Chemical Evolution
The figure summarizes an experiment testing the hypothesis that desert ants measure
the distance from their nest with a built-in pedometer that keeps track of their strides.
Why did the researchers carry out two tests in this experiment? - Answer ✔✔- Test 2
controlled for the possibility that manipulation of the ants, rather than the length of their
altered legs, changed their behavior.
Which of the following conditions is necessary for natural selection to occur? - Answer
✔✔- Individuals in a population must vary.
The figure shows Pasteur's famous experiment that disproved the theory of
spontaneous generation of living cells from nonliving materials. Identify the treatment in
this experiment that Pasteur used to show how cells are able to grow in a broth
following sterilization. - Answer ✔✔- The straight-necked flask with sterilized nutrient
broth
Scientists define a _______ as an explanation for a very broad class of observed
phenomena that is supported by a wide body of evidence. - Answer ✔✔- Theory
Given the sequence, A-T-T-A-G-C-A-G, from an organism's DNA, which one of the
choices would you predict is most closely related to it? - Answer ✔✔- A-T-T-A-C-C-A-G
What is the relationship between a hypothesis and a null hypothesis in an experiment? -
Answer ✔✔- A hypothesis is a testable statement to explain a set of observations. A null
hypothesis states the results that are expected if the hypothesis is incorrect.
All species are related by common ancestry. Which finding provides strong supporting
evidence for this statement? - Answer ✔✔- All organisms have DNA as their genetic
material.
What does the figure indicate about the relationships among domain Bacteria, domain
Archaea, and domain Eukarya? - Answer ✔✔- Domain Archaea and domain Eukarya
are more closely related to each other than either is to domain Bacteria.
Taxonomy is the study of __________. - Answer ✔✔- naming and classifying organisms
, How are fitness and adaptation important to natural selection? - Answer ✔✔- Individuals
that are well adapted to their environment have high evolutionary fitness and are more
likely to reproduce and pass their traits to their offspring.
Which domain(s) include prokaryotes? - Answer ✔✔- Archaea and Bacteria
Which evidence supports the sexual competition hypothesis for giraffe neck length? -
Answer ✔✔- Males compete for the opportunity to mate with females by striking each
other with their heads. Males with longer necks deliver more powerful strikes to their
opponents than males with shorter necks.
Variation in DNA sequences are useful for building a tree of life because __________. -
Answer ✔✔- small subunit RNA sequences are similar in closely related organisms and
less similar in less-closely related organisms
Which of the following is not one of the major theories developed in modern biology? -
Answer ✔✔- Bioaccumulation theory
Select a characteristic that is shared by all living things. - Answer ✔✔- All living things
process genetic information.
Carolus Linnaeus established a system for naming species that is still in use today.
Each type of organism is assigned a two-part name that includes the
_________________. - Answer ✔✔- genus and species
Organisms have two fundamental nutritional needs—chemical energy in the form of a
molecule called ____ and molecules that can be used as building blocks. - Answer ✔✔-
adenosine triphosphate (ATP)
Modern taxonomy attempts to describe the __________, or genealogical relationships,
among organisms. - Answer ✔✔- phylogeny
Which man has the highest evolutionary fitness? - Answer ✔✔- A man who dies at age
20 after fathering five healthy children.
"Biologists practice evidence-based decision making." What does this statement mean?
- Answer ✔✔- Biologists select between a hypothesis and a null hypothesis based on
experimental or observational data.
Which of the following statements best describes the major difference between
prokaryotes and eukaryotes? - Answer ✔✔- Eukaryotic cells have a membrane-bound
nucleus; prokaryotic cells do not.
Update Brand New
If all cells come from other cells, where did the first cells come from? - Answer ✔✔-
Chemical Evolution
The figure summarizes an experiment testing the hypothesis that desert ants measure
the distance from their nest with a built-in pedometer that keeps track of their strides.
Why did the researchers carry out two tests in this experiment? - Answer ✔✔- Test 2
controlled for the possibility that manipulation of the ants, rather than the length of their
altered legs, changed their behavior.
Which of the following conditions is necessary for natural selection to occur? - Answer
✔✔- Individuals in a population must vary.
The figure shows Pasteur's famous experiment that disproved the theory of
spontaneous generation of living cells from nonliving materials. Identify the treatment in
this experiment that Pasteur used to show how cells are able to grow in a broth
following sterilization. - Answer ✔✔- The straight-necked flask with sterilized nutrient
broth
Scientists define a _______ as an explanation for a very broad class of observed
phenomena that is supported by a wide body of evidence. - Answer ✔✔- Theory
Given the sequence, A-T-T-A-G-C-A-G, from an organism's DNA, which one of the
choices would you predict is most closely related to it? - Answer ✔✔- A-T-T-A-C-C-A-G
What is the relationship between a hypothesis and a null hypothesis in an experiment? -
Answer ✔✔- A hypothesis is a testable statement to explain a set of observations. A null
hypothesis states the results that are expected if the hypothesis is incorrect.
All species are related by common ancestry. Which finding provides strong supporting
evidence for this statement? - Answer ✔✔- All organisms have DNA as their genetic
material.
What does the figure indicate about the relationships among domain Bacteria, domain
Archaea, and domain Eukarya? - Answer ✔✔- Domain Archaea and domain Eukarya
are more closely related to each other than either is to domain Bacteria.
Taxonomy is the study of __________. - Answer ✔✔- naming and classifying organisms
, How are fitness and adaptation important to natural selection? - Answer ✔✔- Individuals
that are well adapted to their environment have high evolutionary fitness and are more
likely to reproduce and pass their traits to their offspring.
Which domain(s) include prokaryotes? - Answer ✔✔- Archaea and Bacteria
Which evidence supports the sexual competition hypothesis for giraffe neck length? -
Answer ✔✔- Males compete for the opportunity to mate with females by striking each
other with their heads. Males with longer necks deliver more powerful strikes to their
opponents than males with shorter necks.
Variation in DNA sequences are useful for building a tree of life because __________. -
Answer ✔✔- small subunit RNA sequences are similar in closely related organisms and
less similar in less-closely related organisms
Which of the following is not one of the major theories developed in modern biology? -
Answer ✔✔- Bioaccumulation theory
Select a characteristic that is shared by all living things. - Answer ✔✔- All living things
process genetic information.
Carolus Linnaeus established a system for naming species that is still in use today.
Each type of organism is assigned a two-part name that includes the
_________________. - Answer ✔✔- genus and species
Organisms have two fundamental nutritional needs—chemical energy in the form of a
molecule called ____ and molecules that can be used as building blocks. - Answer ✔✔-
adenosine triphosphate (ATP)
Modern taxonomy attempts to describe the __________, or genealogical relationships,
among organisms. - Answer ✔✔- phylogeny
Which man has the highest evolutionary fitness? - Answer ✔✔- A man who dies at age
20 after fathering five healthy children.
"Biologists practice evidence-based decision making." What does this statement mean?
- Answer ✔✔- Biologists select between a hypothesis and a null hypothesis based on
experimental or observational data.
Which of the following statements best describes the major difference between
prokaryotes and eukaryotes? - Answer ✔✔- Eukaryotic cells have a membrane-bound
nucleus; prokaryotic cells do not.
