FINAL BIOL 102 EXAM: BIOL 102
ESSENTIAL BIOLOGY II W/LAB, 2025/2026
WITH CORRECT/ACCURATE ANSWERS
PORTAGE LEARNING
Focuses on evolution, diversity, animal/plant biology, and ecology.
Evolution and Population Genetics
Biological Diversity
Plant Structure and Function
Animal Anatomy and Physiology
Ecology
ESSENTIAL BIOLOGY II W/LAB
What proportion of species on Earth eventually go extinct?
A) none
B) some
C) half
D) most
E) all - CORRECT-ANSWERS--E) all
Species have gone extinct at constant rates through the history of the
Earth.
A) true
B) false - CORRECT-ANSWERS--B) false
,It is normal for some number of species to become extinct during any
given period of time.
A) true
B) false - CORRECT-ANSWERS--A) true
Which kind of island would be expected to have the fewest species on it?
A) large and near to the continent
B) large and far from the continent
C) small and near to the continent
D) small and far from the continent - CORRECT-ANSWERS--D) small and
far from the continent
Which kind of island would be expected to highest population sizes of a
single native species?
A) large and near to the continent
B) large and far from the continent
C) small and near to the continent
D) small and far from the continent
E) both A and B - CORRECT-ANSWERS--E) both A and B
Which is not a commonly used concept of biological rarity?
A) a species is found in just one habitat
B) a species is found across many habitats
C) a species is found is low population densities
D) a species is found in a small geographic range - CORRECT-ANSWERS--
B) a species is found across many habitats
, Which group of species is most likely to exhibit low population density?
A) large body size
B) medium body size
C) small body size - CORRECT-ANSWERS--A) large body size
Which group of species is most likely to be at risk of extinction?
A) very large animals
B) medium sized animals
C) small animals
D) very small animals - CORRECT-ANSWERS--A) very large animals
Which form of rarity poses the biggest risk of inbreeding depression?
A) small geographic range
B) small local population density
C) limited range of habitats - CORRECT-ANSWERS--B) small local
population density >>>
Here is why:
Inbreeding depression occurs when a small, closed population with limited genetic diversity
mates internally, increasing the likelihood that offspring inherit two copies of harmful or
deleterious recessive genes. This leads to reduced fitness, health problems, and lower
survival rates.
Small local population density means there are fewer available mating partners in close
proximity, which increases the probability of closely related individuals mating (inbreeding).
This directly leads to a higher risk of inbreeding depression.
While a small geographic range and limited range of habitats often contribute to small populations,
the density of the local breeding population is the most direct factor affecting the mating
patterns that cause inbreeding depression.
Which of the following is a good example of metapopulation?
ESSENTIAL BIOLOGY II W/LAB, 2025/2026
WITH CORRECT/ACCURATE ANSWERS
PORTAGE LEARNING
Focuses on evolution, diversity, animal/plant biology, and ecology.
Evolution and Population Genetics
Biological Diversity
Plant Structure and Function
Animal Anatomy and Physiology
Ecology
ESSENTIAL BIOLOGY II W/LAB
What proportion of species on Earth eventually go extinct?
A) none
B) some
C) half
D) most
E) all - CORRECT-ANSWERS--E) all
Species have gone extinct at constant rates through the history of the
Earth.
A) true
B) false - CORRECT-ANSWERS--B) false
,It is normal for some number of species to become extinct during any
given period of time.
A) true
B) false - CORRECT-ANSWERS--A) true
Which kind of island would be expected to have the fewest species on it?
A) large and near to the continent
B) large and far from the continent
C) small and near to the continent
D) small and far from the continent - CORRECT-ANSWERS--D) small and
far from the continent
Which kind of island would be expected to highest population sizes of a
single native species?
A) large and near to the continent
B) large and far from the continent
C) small and near to the continent
D) small and far from the continent
E) both A and B - CORRECT-ANSWERS--E) both A and B
Which is not a commonly used concept of biological rarity?
A) a species is found in just one habitat
B) a species is found across many habitats
C) a species is found is low population densities
D) a species is found in a small geographic range - CORRECT-ANSWERS--
B) a species is found across many habitats
, Which group of species is most likely to exhibit low population density?
A) large body size
B) medium body size
C) small body size - CORRECT-ANSWERS--A) large body size
Which group of species is most likely to be at risk of extinction?
A) very large animals
B) medium sized animals
C) small animals
D) very small animals - CORRECT-ANSWERS--A) very large animals
Which form of rarity poses the biggest risk of inbreeding depression?
A) small geographic range
B) small local population density
C) limited range of habitats - CORRECT-ANSWERS--B) small local
population density >>>
Here is why:
Inbreeding depression occurs when a small, closed population with limited genetic diversity
mates internally, increasing the likelihood that offspring inherit two copies of harmful or
deleterious recessive genes. This leads to reduced fitness, health problems, and lower
survival rates.
Small local population density means there are fewer available mating partners in close
proximity, which increases the probability of closely related individuals mating (inbreeding).
This directly leads to a higher risk of inbreeding depression.
While a small geographic range and limited range of habitats often contribute to small populations,
the density of the local breeding population is the most direct factor affecting the mating
patterns that cause inbreeding depression.
Which of the following is a good example of metapopulation?
