BIO 182 ASU FINAL EXAM WITH COMPLETE QUESTIONS AND
CORRECT ANSWERS GRADED A+
What is exponential growth and when does it occur in nature? - ANSWER--
Exponential growth is positive growth
-Observed in 2 circumstances: a few individuals found a new population in a new
habitat, or a population has been devastated by a catastrophe and begins to
recover, starting with a few surviving individuals
What are some density-independent factors? - ANSWER--Change is not
dependent on the # of individuals in the population
-Variations in weather patterns, etc. (usually abiotic)
What are some advances in agriculture? - ANSWER--Breeding superior plants
-Increased use of irrigation
-Use of chemical fertilizers
-Use of chemical pesticides
How is energy transferred through the food pyramid? - ANSWER-Decomposer -
> primary producer -> primary consumer -> secondary consumer -> tertiary
consumer
What is a trophic level? - ANSWER--"Feeding" level, organisms that obtain energy
from the same type of source
What is biomagnification? - ANSWER--Some pesticides aren't broken down and
become more concentrated at each trophic level
, What does NPP mean and how much is being used by humans? - ANSWER--Net
Primary Productivity = total amount of chemical energy supplied by plants
-Humans use 24% of Earth's NPP
What are some reasons the birth rate has declined in the last 50 years? -
ANSWER--Women choosing to have less children
-Regions with lowest birthrates have the most abundant resources and education
of women is encouraged
What is demographic transition? - ANSWER--The transition from high birth and
death rates to lower birth and death rates
What are density dependent factors? - ANSWER--Predation, disease, competition
between species (usually biotic)
What is carrying capacity? - ANSWER--The maximum population that can be
supported indefinitely in an environment
-Birth rate = death rate
-(K)
What are survivorship curves? - ANSWER--Type 1: Survivorship throughout life is
high, most individuals reach their max. life span (humans)
-Type 2: Most individuals experience constant survivorship over their lifetimes
-Type 3: Result from high death rates early in life, with high survivorship after
maturity (many plants)
What is life history? - ANSWER--Record of major events relating to its growth,
development, reproduction, and survival
CORRECT ANSWERS GRADED A+
What is exponential growth and when does it occur in nature? - ANSWER--
Exponential growth is positive growth
-Observed in 2 circumstances: a few individuals found a new population in a new
habitat, or a population has been devastated by a catastrophe and begins to
recover, starting with a few surviving individuals
What are some density-independent factors? - ANSWER--Change is not
dependent on the # of individuals in the population
-Variations in weather patterns, etc. (usually abiotic)
What are some advances in agriculture? - ANSWER--Breeding superior plants
-Increased use of irrigation
-Use of chemical fertilizers
-Use of chemical pesticides
How is energy transferred through the food pyramid? - ANSWER-Decomposer -
> primary producer -> primary consumer -> secondary consumer -> tertiary
consumer
What is a trophic level? - ANSWER--"Feeding" level, organisms that obtain energy
from the same type of source
What is biomagnification? - ANSWER--Some pesticides aren't broken down and
become more concentrated at each trophic level
, What does NPP mean and how much is being used by humans? - ANSWER--Net
Primary Productivity = total amount of chemical energy supplied by plants
-Humans use 24% of Earth's NPP
What are some reasons the birth rate has declined in the last 50 years? -
ANSWER--Women choosing to have less children
-Regions with lowest birthrates have the most abundant resources and education
of women is encouraged
What is demographic transition? - ANSWER--The transition from high birth and
death rates to lower birth and death rates
What are density dependent factors? - ANSWER--Predation, disease, competition
between species (usually biotic)
What is carrying capacity? - ANSWER--The maximum population that can be
supported indefinitely in an environment
-Birth rate = death rate
-(K)
What are survivorship curves? - ANSWER--Type 1: Survivorship throughout life is
high, most individuals reach their max. life span (humans)
-Type 2: Most individuals experience constant survivorship over their lifetimes
-Type 3: Result from high death rates early in life, with high survivorship after
maturity (many plants)
What is life history? - ANSWER--Record of major events relating to its growth,
development, reproduction, and survival
