Homework 3

 

1.  Plants need which of the following to carry on photosynthesis?

a.	H2O
b.	CO2
c.	O2
d.	both O2 and CO2
e.	both H2O and CO2

 

2.  Chlorophyll reflects (does not absorb) which color of light?

a.	red
b.	yellow
c.	orange
d.	green
e.	blue

 

3.  Define the following:  Autotrophs and Heterotrophs

 

 

4.  Photosynthetic autotrophs use ________ from the air as a carbon source and ________ as their energy source.

 

 

5.  Imagine walking through a garden of red, white, and blue petunias. Explain each of the colors in terms of which wavelengths of light the flower is absorbing.

 

 

6.  While gazing into an aquarium, you observe bubbling from an aquatic plant. What's going on?

 

 

7.  What are the main products of photosynthesis?  Of glycolysis?

 

 

8.  Where does the biochemical process of aerobic respiration take place?

 

 

9.  How does anaerobic respiration help explain the cramps athletes feel after vigorous physical activity?

 

 

10.  How does asexual reproduction by mitosis contribute to the growth and/or survival of the organism? What are the advantages and limitations of mitotic division as a method of reproduction?

 

 

11.  How does sexual reproduction by meiosis contribute to the growth and/or survival of the organism? What are the advantages and limitations of meiotic division as a method of reproduction?

 

 

12.  How does cell division in plant cells differ from that in animal cells?

 

 

 

13. What are gametes, and how do they produce a diploid cell with the normal chromosome number?