BIOB51 Term Test 1 Notes 2025/2026
Exam Questions and Detailed Answers |
Get it 100% Correct Answers
Why is it often difficult to conceptualize biological evolution? - 🧠 ANSWER
✔✔Mechanisms are often challenging to describe
Issue with scale and the concept of time
Difficulty demonstrating and observing "evolution" in a teaching lab
What is the difference between a theory and a fact? - 🧠 ANSWER ✔✔-A
theory is a well-established, well-supported, well-documented explanation
for our observations.
-A fact is evidence to support a theory
What is the relationship between theory and law? - 🧠 ANSWER ✔✔Laws
describe something, Theories explain something
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
1
,Why is it important that we have a grasp on the concept of time, in an
evolutionary sense? - 🧠 ANSWER ✔✔-Because time gives way to
evolution;
-Evolutionary terms, 5-7 million years is recent (because divergence of
genomes still identical)
How does an understanding of evolution inform us about all aspects of life
and the interconnectivity of life? - 🧠 ANSWER ✔✔Evolution explains how
living things are changing today and how modern living things have
descended from ancient life forms that no longer exist on Earth. As living
things evolve, they generally become better suited for their environment.
This is because they evolve adaptations
Why do we know that whales are mammals? We discussed several
features and examples - 🧠 ANSWER ✔✔Whales share numerous
synapomorphies with mammals (Mammary glands
Three middle ear bones and Hair (in developing embryos)).
Also, Similarities with fish arose through convergent evolution
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
2
, What is Pakicetus and how does it fit within the phylogeny of cetaceans? -
🧠 ANSWER ✔✔Pakicetus was classified as an early cetacean due to
characteristic features of the inner ear found only in cetaceans (namely, the
large auditory bulla is formed from the ectotympanic bone only)
Pakicetus represents a transitional taxon between extinct land mammals
and modern cetaceans
What is a synapomorphy? - 🧠 ANSWER ✔✔A synapomorphy is a derived
form of a trait that is shared by a group of related species (that is, one that
evolved in the immediate common ancestor of the group and was inherited
by all its descendants)
What are isotopic analyses? - 🧠 ANSWER ✔✔
How was 18 O/16 O used in our understanding of saltwater and freshwater
cetaceans? - 🧠 ANSWER ✔✔
How is it that modern cetaceans do not have hindlimbs? - 🧠 ANSWER
✔✔Embryos do grow hindlimb buds, but their development is terminated
very early because of a mutation in a regulatory gene
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
3
Exam Questions and Detailed Answers |
Get it 100% Correct Answers
Why is it often difficult to conceptualize biological evolution? - 🧠 ANSWER
✔✔Mechanisms are often challenging to describe
Issue with scale and the concept of time
Difficulty demonstrating and observing "evolution" in a teaching lab
What is the difference between a theory and a fact? - 🧠 ANSWER ✔✔-A
theory is a well-established, well-supported, well-documented explanation
for our observations.
-A fact is evidence to support a theory
What is the relationship between theory and law? - 🧠 ANSWER ✔✔Laws
describe something, Theories explain something
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
1
,Why is it important that we have a grasp on the concept of time, in an
evolutionary sense? - 🧠 ANSWER ✔✔-Because time gives way to
evolution;
-Evolutionary terms, 5-7 million years is recent (because divergence of
genomes still identical)
How does an understanding of evolution inform us about all aspects of life
and the interconnectivity of life? - 🧠 ANSWER ✔✔Evolution explains how
living things are changing today and how modern living things have
descended from ancient life forms that no longer exist on Earth. As living
things evolve, they generally become better suited for their environment.
This is because they evolve adaptations
Why do we know that whales are mammals? We discussed several
features and examples - 🧠 ANSWER ✔✔Whales share numerous
synapomorphies with mammals (Mammary glands
Three middle ear bones and Hair (in developing embryos)).
Also, Similarities with fish arose through convergent evolution
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
2
, What is Pakicetus and how does it fit within the phylogeny of cetaceans? -
🧠 ANSWER ✔✔Pakicetus was classified as an early cetacean due to
characteristic features of the inner ear found only in cetaceans (namely, the
large auditory bulla is formed from the ectotympanic bone only)
Pakicetus represents a transitional taxon between extinct land mammals
and modern cetaceans
What is a synapomorphy? - 🧠 ANSWER ✔✔A synapomorphy is a derived
form of a trait that is shared by a group of related species (that is, one that
evolved in the immediate common ancestor of the group and was inherited
by all its descendants)
What are isotopic analyses? - 🧠 ANSWER ✔✔
How was 18 O/16 O used in our understanding of saltwater and freshwater
cetaceans? - 🧠 ANSWER ✔✔
How is it that modern cetaceans do not have hindlimbs? - 🧠 ANSWER
✔✔Embryos do grow hindlimb buds, but their development is terminated
very early because of a mutation in a regulatory gene
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
3
