Biology 1050 Exam 4 ECU Test Questions and Correct Answers
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BIO 1050
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BIO 1050
What best defines a biome? Areas with distinct plant communities and associated with particular climates
The distribution of terrestrial biomes across the globe corresponds most to? Climate
What is the main source of energy that drives global climate? Solar Energy
What are wind circulation patte...
biology 1050 exam 4 ecu test questions and correct
what best defines a biome areas with distinct pl
the distribution of terrestrial biomes across the
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Biology 1050 Exam 4 ECU Test
Questions and Correct Answers
What best defines a biome? ✅Areas with distinct plant communities and associated
with particular climates
The distribution of terrestrial biomes across the globe corresponds most to? ✅Climate
What is the main source of energy that drives global climate? ✅Solar Energy
What are wind circulation patters driven by? ✅The uneven heating of earth's surface
What populations does genetic drift have the strongest effects in? ✅Small and isolated
What does the biological species concept define a species as? ✅Any group of actually
or potentially interbreeding species that produce viable, fertile offspring
Scientists caught 20 seals and used them to create a new population. What will least
likely affect these seals? ✅Random Mating
How is extinction represented in a tree diagram? ✅A branch ends
What taxonomic rank is the LEAST inclusive? ✅Genus
Urey and Miller mixed H2, CH4 (methane), and NH4 (ammonia) in the early 1950s and
a few days later found what in the system? ✅Amino Acids
What is the biological species concept primarily based on? ✅Reproductive Isolation
What is an isolating mechanism that includes hybrid mortality and hybrid infertility?
✅Postzygotic
The taxonomic rank that includes species but not families is what? ✅Genus
What is the taxonomic rank from most to least inclusive? ✅Domain
Phylum
Family
Genus
Species
The current mass extinction is believed to be primarily caused by what? ✅Human
Actions
, The extinction that occurred on earth 65 million years ago marked the end of what?
✅The Age of Dinosaurs
When two or more members of the same species live in the same place at the same
time, they constitute a what? ✅A Population
The population size that a particular habitat can support indefinitely is called the what?
✅Carrying Capacity
What type of effect has an increasing impact as the population size increases?
✅Density-dependent effect
A species most likely to exhibit the Type 2 survivorship curve would be what? ✅Blue
Jays
A population pyramid that gets wider in shape with higher age groups represents _____
while a population pyramid with nearly parallel lines represents _______. ✅Declining
growth; Stationary growth
If a tiger and a lion were to mate, what may be a result? ✅Sterile or partially sterile
offspring are produced
Blue-footed boobies do not mate with birds who do not know a complex dance. This is
an example of what? ✅Behavioral Isolation
What type of selection favors organisms that have character values at both extremes of
the phenotypic distribution? ✅Distributive
A breeder only breeds the fastest horses. This is an example of what type of selection?
✅Artificial Directional
What does the demographic transition include? ✅A decrease in the death rate
followed by a decrease in the birth rate as a population becomes industrialized
A primary difference in the age-pyramid of industrialized versus third-world countries is
what? ✅Third-world countries have much larger proportions of their population in the
youngest age group
What gas was the least abundant in the earth's atmosphere 3.5 million years ago?
✅Oxygen
What is the approximate age of Earth? ✅4.6 billion years
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