BIOL 2150 EXAM 1 QUESTIONS WITH VERIFIED
ANSWERS
Humans and chimpanzees last shared a common ancestor around ____________
million years ago, and our genomes now differ by about ____________%.
(Chapter 24 lecture 5) - Answers - 5-7; 1
Genetic sequence data from mitochondrial and Y chromosome DNA agree that the
human family is ____________ and it arose ____________.
(Chapter 24 lecture 5) - Answers - young; in Africa
Culture
(Chapter 24 lecture 5) - Answers - A body of learned behavior that is socially
transmitted among individuals and passed down from one generation to the next
All evidence suggests that the Neanderthals did not interbreed with our ancestors.
(Chapter 24 lecture 5) - Answers - False
Neoteny
(Chapter 24 lecture 5) - Answers - The evolutionary process in which the timing of
development is altered so that a sexually mature organism retains the physical
characteristics of the juvenile form
The shift to bipedalism required changes to the architecture of which of the following?
(Chapter 24 lecture 5) - Answers - pelvis
spine
legs
skull
If the multiregional hypothesis of human origins is correct, modern human populations
last shared a common ancestor around two million years ago. If the out-of-Africa
hypothesis is correct, we last shared a common ancestor around ____________ years
ago.
(Chapter 24 lecture 5) - Answers - 200,000
When Rebecca Cann decided to research on the evolution of humans, she chose to
study mitochondrial DNA. Which of the following explains why she chose this type of
DNA?
(Chapter 24 lecture 5) - Answers - because mitochondrial DNA is more abundant and
therefore easier to extract
Which of the following groups is monophyletic?
(Chapter 24 lecture 5) - Answers - Old world monkey and apes
, In addition to the shift to bipedalism, what major trend or trends do we see in hominin
evolution as we look across our entire fossil record? Select all that apply.
(Chapter 24 lecture 5) - Answers - Increase in body size
Increase in brain size
In the northern and southern hemispheres, the rate of photosynthesis is ____________
in the summer and ____________ in the winter.
(Chapter 25 Lecture 6) - Answers - highest; lowest
The Keeling curve in Figure 25.1 shows that while CO2 levels oscillate on an annual
basis, overall CO2 levels increase from year to year.
Why has this trend continued in the last 50 years?
(Chapter 25 Lecture 6) - Answers - combustion of fossil fuels
True or false: CO2 is considered a greenhouse gas because it traps heat emitted from
Earth's surface in the atmosphere, affecting global temperatures.
(Chapter 25 Lecture 6) - Answers - True
Photosynthesis ____________ the atmosphere while respiration ____________ the
atmosphere.
(Chapter 25 Lecture 6) - Answers - removes CO2 from; introduces CO2 to
Over the last several decades, what have researchers discovered about atmospheric
CO2 levels?
(Chapter 25 Lecture 6) - Answers - They have collectively increased
The rate of respiration ____________ throughout the year.
(Chapter 25 Lecture 6) - Answers - Remains Constant
Measuring the isotopic composition of atmospheric CO2 shows that the burning of fossil
fuels had led to ____________ CO2 levels over the last 200 years. - Answers -
increasing
The ____________ deals with geological processes and carbon reservoirs, some of
which have been built up (or take place) over a period of millennia. In contrast, the
____________ involves biological processes that are carried out on a daily and/or
seasonal basis.
(Chapter 25 Lecture 6) - Answers - long-term carbon cycle; short-term carbon cycle
Which of the following is the largest carbon reservoir?
(Chapter 25 Lecture 6) - Answers - Marine sediments and sedimentary rock
ANSWERS
Humans and chimpanzees last shared a common ancestor around ____________
million years ago, and our genomes now differ by about ____________%.
(Chapter 24 lecture 5) - Answers - 5-7; 1
Genetic sequence data from mitochondrial and Y chromosome DNA agree that the
human family is ____________ and it arose ____________.
(Chapter 24 lecture 5) - Answers - young; in Africa
Culture
(Chapter 24 lecture 5) - Answers - A body of learned behavior that is socially
transmitted among individuals and passed down from one generation to the next
All evidence suggests that the Neanderthals did not interbreed with our ancestors.
(Chapter 24 lecture 5) - Answers - False
Neoteny
(Chapter 24 lecture 5) - Answers - The evolutionary process in which the timing of
development is altered so that a sexually mature organism retains the physical
characteristics of the juvenile form
The shift to bipedalism required changes to the architecture of which of the following?
(Chapter 24 lecture 5) - Answers - pelvis
spine
legs
skull
If the multiregional hypothesis of human origins is correct, modern human populations
last shared a common ancestor around two million years ago. If the out-of-Africa
hypothesis is correct, we last shared a common ancestor around ____________ years
ago.
(Chapter 24 lecture 5) - Answers - 200,000
When Rebecca Cann decided to research on the evolution of humans, she chose to
study mitochondrial DNA. Which of the following explains why she chose this type of
DNA?
(Chapter 24 lecture 5) - Answers - because mitochondrial DNA is more abundant and
therefore easier to extract
Which of the following groups is monophyletic?
(Chapter 24 lecture 5) - Answers - Old world monkey and apes
, In addition to the shift to bipedalism, what major trend or trends do we see in hominin
evolution as we look across our entire fossil record? Select all that apply.
(Chapter 24 lecture 5) - Answers - Increase in body size
Increase in brain size
In the northern and southern hemispheres, the rate of photosynthesis is ____________
in the summer and ____________ in the winter.
(Chapter 25 Lecture 6) - Answers - highest; lowest
The Keeling curve in Figure 25.1 shows that while CO2 levels oscillate on an annual
basis, overall CO2 levels increase from year to year.
Why has this trend continued in the last 50 years?
(Chapter 25 Lecture 6) - Answers - combustion of fossil fuels
True or false: CO2 is considered a greenhouse gas because it traps heat emitted from
Earth's surface in the atmosphere, affecting global temperatures.
(Chapter 25 Lecture 6) - Answers - True
Photosynthesis ____________ the atmosphere while respiration ____________ the
atmosphere.
(Chapter 25 Lecture 6) - Answers - removes CO2 from; introduces CO2 to
Over the last several decades, what have researchers discovered about atmospheric
CO2 levels?
(Chapter 25 Lecture 6) - Answers - They have collectively increased
The rate of respiration ____________ throughout the year.
(Chapter 25 Lecture 6) - Answers - Remains Constant
Measuring the isotopic composition of atmospheric CO2 shows that the burning of fossil
fuels had led to ____________ CO2 levels over the last 200 years. - Answers -
increasing
The ____________ deals with geological processes and carbon reservoirs, some of
which have been built up (or take place) over a period of millennia. In contrast, the
____________ involves biological processes that are carried out on a daily and/or
seasonal basis.
(Chapter 25 Lecture 6) - Answers - long-term carbon cycle; short-term carbon cycle
Which of the following is the largest carbon reservoir?
(Chapter 25 Lecture 6) - Answers - Marine sediments and sedimentary rock
