Which of the following is NOT associated with an electron microscope?
A) an electron beam
B) magnetic fields
C) a prism
D) a fluorescent screen
E) a vacuum
C
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Which one of the following features is unique to animals?
A. cells organized into tissues B. movement associated with muscle tissue and nervous tissue C. heterotrophism D. cells without walls E. embryonic development
Four of the five answers listed below are differences between archaea and bacteria. Select the exception
a. cell wall components b. membrane components c. ribosomal RNA sequences d. DNA nucleotides e. DNA and histone organization
Which of the following statements is an example of active transport?
1.Dye molecules diffusing after being dropped into a beaker of water. 2.Phospholipids drifting sideways in the plasma membrane. 3.Glucose binding to a transport protein to cross the membrane with the concentration gradient. 4.Calcium pumps in muscle cells transporting calcium against the concentration gradient.
A few sugars joined together are called a(n)
a. glycoside. b. oligosaccharide. c. polysaccharide. d. starch