BIO 124- Exam 1 UPDATED ACTUAL
Exam Questions and CORRECT Answers
What percent of amphibian species are threatened with extinction? - CORRECT
ANSWER - 32%
Major factor in recent extinctions, and is an emerging infectious disease. - CORRECT
ANSWER - Chytridiomycosis
Greatest threat to amphibians - CORRECT ANSWER - Habitat loss
Batrachochytrium dendrobatidis - CORRECT ANSWER - - Fungal species
- Lives on skin and eats keratin
- Only species of chytrid known to live on amphibians
- Problem in "pristine" areas.
- Causes heart failure
What increases the risk of Malaria? - CORRECT ANSWER - Frog density decreasing
Mosquito density increasing
Ecology - CORRECT ANSWER - How organisms interact with their environment
What are the two aspects that encompass ecology? - CORRECT ANSWER - Abundance
and Distribution
Distribution - CORRECT ANSWER - Where organisms are found
Abundance - CORRECT ANSWER - How many organisms occur there
,What level of biological organization do ecologists study? - CORRECT ANSWER --
Ecosystems
- Communities
- Populations
(in the fashion of decreasing level of understanding)
What type of impacts does environmental science focus on? - CORRECT ANSWER -
Human impacts
Why study ecology? - CORRECT ANSWER - 1. It enriches life.
2. It's necessary for human survival.
What is Evolution? - CORRECT ANSWER - The theory that all organisms on Earth are
related by common ancestry and that they have changed over time in response to natural
selection.
Why learn evolution? - CORRECT ANSWER - - The major unifying theory in biology
- A societal issue
- Many misconceptions about it
- It has important practical applications (conservation genetics, selective breeding, rapid
evolution of traits)
- The theory of evolution has broad explanatory and predictive power.
- Evolution requires a genetic basis to traits.
- Evolution occurs in fits and starts (uneven rate of evolution)
A species is given a __________ designation - CORRECT ANSWER - Binomial; Genus
name followed by the specific name
Steps to the scientific method - CORRECT ANSWER - 1-- observation
, 2-- formulate a question
3-- formulate an hypothesis (prediction)
4-- test hypothesis
5-- evaluate the results of the test
Hypothesis must be _____ - CORRECT ANSWER - testable; falsifiable
Can hypotheses be 'proved'? - CORRECT ANSWER - No;
- It is provisional--science is always open to revision
- A continuum from very high probability of being true to being false
- Science is self-correcting
Hypothesis vs. Theory - CORRECT ANSWER - - Hypothesis has a narrow explanatory
scope
- Theory has a very broad explanatory scope
Theory in Everyday vs. Theory in Science - CORRECT ANSWER - - In everyday use
"theory" is an untested hypothesis
- In science "theory" is a much supported postulate with a wide range of explanatory and
predictive power = a fact
Jean Baptiste Lamarck - CORRECT ANSWER - - Recognized that species evolved
- Proposed "use and disuse" theory (1809)
Population thinking - CORRECT ANSWER - Individuals do not change.
Populations change.
Does the environment itself cause traits to change? - CORRECT ANSWER - No
Exam Questions and CORRECT Answers
What percent of amphibian species are threatened with extinction? - CORRECT
ANSWER - 32%
Major factor in recent extinctions, and is an emerging infectious disease. - CORRECT
ANSWER - Chytridiomycosis
Greatest threat to amphibians - CORRECT ANSWER - Habitat loss
Batrachochytrium dendrobatidis - CORRECT ANSWER - - Fungal species
- Lives on skin and eats keratin
- Only species of chytrid known to live on amphibians
- Problem in "pristine" areas.
- Causes heart failure
What increases the risk of Malaria? - CORRECT ANSWER - Frog density decreasing
Mosquito density increasing
Ecology - CORRECT ANSWER - How organisms interact with their environment
What are the two aspects that encompass ecology? - CORRECT ANSWER - Abundance
and Distribution
Distribution - CORRECT ANSWER - Where organisms are found
Abundance - CORRECT ANSWER - How many organisms occur there
,What level of biological organization do ecologists study? - CORRECT ANSWER --
Ecosystems
- Communities
- Populations
(in the fashion of decreasing level of understanding)
What type of impacts does environmental science focus on? - CORRECT ANSWER -
Human impacts
Why study ecology? - CORRECT ANSWER - 1. It enriches life.
2. It's necessary for human survival.
What is Evolution? - CORRECT ANSWER - The theory that all organisms on Earth are
related by common ancestry and that they have changed over time in response to natural
selection.
Why learn evolution? - CORRECT ANSWER - - The major unifying theory in biology
- A societal issue
- Many misconceptions about it
- It has important practical applications (conservation genetics, selective breeding, rapid
evolution of traits)
- The theory of evolution has broad explanatory and predictive power.
- Evolution requires a genetic basis to traits.
- Evolution occurs in fits and starts (uneven rate of evolution)
A species is given a __________ designation - CORRECT ANSWER - Binomial; Genus
name followed by the specific name
Steps to the scientific method - CORRECT ANSWER - 1-- observation
, 2-- formulate a question
3-- formulate an hypothesis (prediction)
4-- test hypothesis
5-- evaluate the results of the test
Hypothesis must be _____ - CORRECT ANSWER - testable; falsifiable
Can hypotheses be 'proved'? - CORRECT ANSWER - No;
- It is provisional--science is always open to revision
- A continuum from very high probability of being true to being false
- Science is self-correcting
Hypothesis vs. Theory - CORRECT ANSWER - - Hypothesis has a narrow explanatory
scope
- Theory has a very broad explanatory scope
Theory in Everyday vs. Theory in Science - CORRECT ANSWER - - In everyday use
"theory" is an untested hypothesis
- In science "theory" is a much supported postulate with a wide range of explanatory and
predictive power = a fact
Jean Baptiste Lamarck - CORRECT ANSWER - - Recognized that species evolved
- Proposed "use and disuse" theory (1809)
Population thinking - CORRECT ANSWER - Individuals do not change.
Populations change.
Does the environment itself cause traits to change? - CORRECT ANSWER - No
