Question

1. In October of 2003, a raging wildfire swept through themountain ecosystems in Southern California, burning everything inits path to the ground and driving away all of the animals. Inorder for the mountain ecosystem to establish itself, which memberof the food web has to return first?

Deer

Coyotes

Snake

Grasses

2. Suppose you conduct an experiment which simulates glacialrecession over time. What is the dependent variable in thisexperiment?

Glacial mass

Sunlight

The season

Time

3. How many dependent variables can be tested during any singleexperiment?

4

3

2

1

4. The effectiveness of a medication containing growth hormonesis tested on a group of young male rabbits 3 weeks of age. The bestcontrol group would be:

Any group of rabbits

A group of male rabbits, three weeks old, not given themedication

A group of female rabbits, three weeks old, not given themedication

A mixed group of male/female rabbits, three weeks old, not giventhe medication

No control is required; just measure whether the rabbitsgrew

5. When writing a lab report or a research paper, you need toshow what the difference is between the