|
Page
|
Question
|
Answer
|
Activity/ Subject |
|
70
|
What is evolution?
|
|
|
|
70
|
How old is the Earth?
|
4.5 billion yrs
|
|
|
70
|
Why was the term Deep Time developed?
|
Humans cannot perceive the length of time dealing with the Earth’s age (billions of yrs)
|
Create a ‘clock of life’ or timeline
|
|
71
|
|
|
Draw a cladistic ‘tree of life’ for a group of organisms
|
|
72
|
Explain how evolution causes changes.
|
It causes changes over time, but the change itself may be abrupt
|
Research the 5 mass extinctions and explain how they affected the life presently on Earth.
|
|
73
|
What is a tetrapod?
|
An organism with four limbs
|
|
|
73
|
Why is being a tetrapod important?
|
Various
|
|
|
73-74
|
What is a sentinal species?
|
Certain classes of organisms, because of their constant or heightened exposure, may be more sensitive to environmental stresses and therefore provide an early warning of environmental degradation.
|
|
|
74
|
Explain why the ‘canary in the coal mine’ scenario does and does not apply to the deformed frogs.
|
|
Sting song – ‘Canary in the coal mine’
Student created poetry or song.
|
|
74
|
Why did some people refer to the frogs as “thalidomide frogs”?
|
|
|
|
75
|
What is a species? Is it always a clear definition? Explain.
|
|
|
|
75
|
Besides limb development, what do you think might be highly conserved between species? Why?
|
various
|
|
|
76
|
What does a toxicologist do?
|
Tries to determine the effective dose required to produce a biological response with a chemical within a specific organism.
|
Lethal dose experiments with brine shrimp.
|
|
77
|
Compare chemical toxicity in humans with drinking wine.
|
Chemicals will affect different humans differently, based on their age, weight, and exposure. Wine has the same affect- a large man in good health can drink a glass and it will have no affect,
but a petite young woman who does not drink may be highly affected (or something like this)
|
|
|
78
|
What is a carcinogen?
|
A cancer-causing agent
|
|
|
78
|
What is a genotoxin?
|
A compound that alters DNA
|
|
|
79
|
|
|
Research a heavy metal, PCB, or dioxin and explain how it stays in the ecosystem and give a specific example of when and why it was used and its effects.
|
|
79
|
Defend or refute: The Bocks’ lake outbreak was good news for the deformed frog research.
|
Good: eliminates the likelihood of a genetic mutations (seen in multiple sp); the lake is a natural area – not recently exposed to something dug up
Bad: the cause for deformities may be that much more complicated than originally hoped
Answers will vary some
|
|
