Biological Science 7th Edition Freeman
Questions & Answers with rationales
(Chapter 1-54 2025/2026 Graded A+
7) In comparison to eukaryotes, prokaryotes ________.
D) do not have membranes
8) The structure of double helical DNA ________.
9) Which of these provides evidence of the common ancestry of all life?
B) near universality of the genetic code
10) Protists and bacteria are grouped into different domains because ________.
C) protists have a membrane-bounded nucleus, which bacterial cells lack
11) You have isolated and purified a new species of cells from the rain forest
and you want to place this new species in the appropriate branch of the tree of
life. You sequence the ribosomal RNA genes from these cells and discover that
for one particular region of the ribosomal gene (the rRNA) the RNA sequence is
AAUGAAGG. You have sequences from the same region of the ribosomal genes
(the rRNA) from each of these species: bacteria, eukaryote and archaea, which
are listed below.
, C) eukaryote
12) How does a scientific theory differ from a scientific hypothesis?
B) Theories are usually an explanation for a more general phenomenon;
hypotheses typically address more specific issues.
13) Louis Pasteur's experiment had a good design because ________.
13) Louis Pasteur's experiment had a good design because ________.
14) Recall the experiment on ant navigation. To run a controlled experiment,
what parameters were held constant for the test group of 75 ants?
D) all variables except leg length
15) For many years, no one bothered to test the food-competition hypothesis
for why giraffes have long necks. Why?
B) The hypothesis was so plausible that no one thought to question it.
16) A friend of yours calls to say that his car would not start this morning. He
asks for your help. You say that you think the battery must be dead. If so, then
jump-starting the car from a good battery will solve the problem. In doing so,
you are ________.
C) stating a hypothesis and using that hypothesis to make a testable prediction
17) Agrobacterium infects plants and causes them to form tumors. You are
asked to determine how long a plant must be exposed to these bacteria to
Questions & Answers with rationales
(Chapter 1-54 2025/2026 Graded A+
7) In comparison to eukaryotes, prokaryotes ________.
D) do not have membranes
8) The structure of double helical DNA ________.
9) Which of these provides evidence of the common ancestry of all life?
B) near universality of the genetic code
10) Protists and bacteria are grouped into different domains because ________.
C) protists have a membrane-bounded nucleus, which bacterial cells lack
11) You have isolated and purified a new species of cells from the rain forest
and you want to place this new species in the appropriate branch of the tree of
life. You sequence the ribosomal RNA genes from these cells and discover that
for one particular region of the ribosomal gene (the rRNA) the RNA sequence is
AAUGAAGG. You have sequences from the same region of the ribosomal genes
(the rRNA) from each of these species: bacteria, eukaryote and archaea, which
are listed below.
, C) eukaryote
12) How does a scientific theory differ from a scientific hypothesis?
B) Theories are usually an explanation for a more general phenomenon;
hypotheses typically address more specific issues.
13) Louis Pasteur's experiment had a good design because ________.
13) Louis Pasteur's experiment had a good design because ________.
14) Recall the experiment on ant navigation. To run a controlled experiment,
what parameters were held constant for the test group of 75 ants?
D) all variables except leg length
15) For many years, no one bothered to test the food-competition hypothesis
for why giraffes have long necks. Why?
B) The hypothesis was so plausible that no one thought to question it.
16) A friend of yours calls to say that his car would not start this morning. He
asks for your help. You say that you think the battery must be dead. If so, then
jump-starting the car from a good battery will solve the problem. In doing so,
you are ________.
C) stating a hypothesis and using that hypothesis to make a testable prediction
17) Agrobacterium infects plants and causes them to form tumors. You are
asked to determine how long a plant must be exposed to these bacteria to
