BIOL110: foundations of cell biology TEST #6 CH. 12 & 13
Questions With Complete Solutions
Adaptations Correct Answer modifications fit them to specific
ways of life in their environment
At what level is evolutionary impact seen in a group of
organisms Correct Answer Population level
Biotechnology Correct Answer Manipulation of organisms or
their components to make useful products
Bottleneck effect Correct Answer drastic reduction in
population size
Describe the essence of natural selection and how this
mechanism works based on what Darwin deduced Correct
Answer 1. Not enough resources
2. Struggle for survival (offspring die)
3. Traits better suited to survive
Difference between intrasexual and intersexual selection
Correct Answer Intra- compete with same sex for mates
Inter- one sex choosy in selecting mates
DNA cloning Correct Answer Production of many identical
copies of a target segment of DNA
DNA ligase Correct Answer Links "glues" two molecules
together to create recombinant plasmid
, DNA profiling Correct Answer Analysis of DNA samples to
determine whether they came from the same individual
DNA technology Correct Answer Gives scientists abilities to
extract genes from one organism and transfer them to another
Evolution Correct Answer Changes in the genetic material of a
population over time
Evolutionary tree Correct Answer ways that biologists
represent patterns of ancestral descent for organisms
Example of vestigial structure Correct Answer Wisdom teeth in
humans
Blind fish that live in dark depths of oceans
Examples of homologous structures Correct Answer Features
have different functions but are structurally similar
Flipper and an arm has same bones
Examples of how gene flow can occur Correct Answer
Humans move freely about the world
Examples of intrasexual and intersexual selection Correct
Answer Intra- rituals, displays, or physical combat
Inter- Males more colorful often more attractive to females
Examples of sexual dimorphism Correct Answer Peacock
males having very colorful feathers and females having little to
no color
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