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Biology Mid-Term Exam Review 2012 – 13
ANSWERKEY
Chapter 1
1. The science or study of life is called Biology.
2. Define biosphere: part of the Earth where all organisms live.
3. Define ecosystem: organisms and the non-living factors in an area.
4. Define population: a group of the same species in an area.
5. List the 8 characteristics of life (Is virus a living thing? – NO)
1. made of at least one cell
2. reproduce
3. based on universal genetic code (have DNA and/or RNA)
4. grow and/or develop
5. obtain and use energy
6. respond to their environment
7. maintain stable internal environment (homeostasis)
8. evolve over time (as a group)
6. What is the smallest unit of life capable of carrying out all life functions? cell
7. Several tissues together make up an organ.
8. A red blood cell is an example of what level of organization? cellular
9. What microscope is used to view the internal structures of a specimen? Transmission Electron Microscope (TEM)
10. What microscope shows 3D surface structures? Scanning Electron Microscope (SEM)
11. Which microscope uses a beam of electrons to make a specimen visible? Electron Microscope
12. What happens to the field of view of a microscope as the magnification increases? It decreases
13. List the function of the following microscope parts:
a. stage – holds specimen or slide
b. eyepiece – lens you look through to view specimen (ocular lens)
c. diaphragm – adjusts amount of light
d. objective lens – increases or decreases magnification
e. revolving nosepiece – turns objective lens
14. List the magnification of the following:
a. eyepiece 10x
b. low power objective lens x eyepiece 4 x 10 = 40
c. high power...