Research, Scientific Collaboration, Microscopes

A microscope is an instrument that.

• makes faraway objects look closer.
• makes small objects appear larger.
• decreases the size of small objects.
• increases the size of small objects.

What is part 6?

• Diaphragm

• base
• body tube
• illuminator

What is part 11?

• coarse adjustment
  
• fine adjustment
• diaphragm
  
• stage

What will be the total magnification if the ocular lens is 10X and the objective lens is 40X?

• 40X
• 10X
• 100X
• 400X

Scientific journal articles are periodical publications ◦intended to further the progress of science, usually by reporting what?

• old research

• new research

• science

• journals

Who are articles in scientific journals not most likely written by

• students

• researchers

• professors

• professional journalists

The discovery that chromosomes are involved in inheritance was made possible by the invention of the —

• computer
• microgram scale
• mercury thermometer
• microscope

In 1869, DNA was discovered within the nuclei of cells. By the 1940s, scientists knew that chromosomes were made of both DNA and protein but did not know which was the genetic material of cells. In the 1950s, scientists demonstrated that DNA is the material responsible for heredity. In 1953, using information collected by other scientists, an American biologist and an English physicist built a three- dimensional model of DNA. These discoveries best illustrate the importance of —

• independent research
• recent improvements in the scientific method
• collaborative efforts amoung scientists
• replication of results