Biology Questions Assignment 1

Directions:  

The researchers performed a 6-week trial with 191 individuals, all of whom were heavy coffee drinkers (average of 5 cups/day) prior to the experiment, but none of whom were smokers. They divided the 191 participants into three groups: no coffee consumption, 1-3 cups/day, and 4 or more cups/day. They measured blood levels of cholesterol and homocysteine as indicators of heart health. Only the no-coffee group showed a significant drop in both indicators. Previous studies had demonstrated that decreases of the magnitude observed in the no-coffee group could cut the incidence of heart disease by 10-15%.  

a)    What is the problem/question being studied? 

b)   What is the hypothesis? 

c) What is the experimental variable? 

d)   List the controls. 

e)   What is being measured to test the hypothesis? 

Locate and summarize an reliable internet article that relates to any course topic covered in Unit II  

Follow these steps to complete this assignment:  

TOPIC I CHOOSE- Genetic mutations and how they can cause illness  

1. Locate a reliable internet article that deals with one aspect of the course material from chapters 5, 6, OR 7.

2  Read the article.   

4. In a written assignment, briefly describe the content of the article and explain how the article relates to the course material in the chapter you chose. In your explanation, be sure to define or describe the advance in medicine that relates to our course content. 

1.  Which are more closely related to crocodiles:  birds or lizards? Explain.

2. Feathers evolved for purposes other than flight. What are some possible functions for          these early feathers?

3.  List and describe three features of plants that help them avoid or reduce predation. 

4. You encounter the organisms:  Homo sapien. What does the first term refer to?  What does the second term refer to?    

5.  What are the three key factors that influence species richness in an ecosystem?