AP bio chapter 4 Moodle question

In order to obtain some materials and remove waste, what process is used by prokaryotes? a. diffusion b. cell division c. flagellar motion d. ribosomes

a

Which of the following statements is part of the cell theory? a. All living organisms are made of cells. b. All cells depend on their surroundings to provide energy. c. All cells have a nucleus. d. All cells contain DNA that they pass on to daughter cells.

a

What are the advantages and disadvantages of light microscopes? What are the advantages and disadvantages of electron microscopes? a. Advantage: Light microscopes have high resolution. Electron microscopes are helpful in viewing surface details of a specimen. Disadvantage: Light microscopes kill the cell. Electron microscopes are costly and low resolution. b. Advantage: In light microscopes, the light beam does not kill the cell. Electron microscopes are helpful in viewing intricate details of a specimen and have high resolution. Disadvantage: Light microscopes have low resolving power. Electron microscopes are costly and require killing the specimen. c. Advantage: Light microscopes have high resolution. Electron microscopes are helpful in viewing surface details of a specimen. Disadvantage: Light microscopes can be used only in the presence of light and are costly. Electron microscopes uses short wavelength of electrons and hence have lower magnification. d. Advantage: Light microscopes have high magnification. Electron microscopes are helpful in viewing surface details of a specimen. Disadvantage: Light microscopes can be used only in the presence of light and have lower resolution. Electron microscopes can be used only for viewing ultra-thin specimens.

b

When bacteria lack fimbriae, what are they less likely to do? a. retain the ability to divide b. Adhere to cell surfaces c. synthesize proteins d. swim through bodily fluids

b

Which of the following could most effectively be visualized with a scanning electron microscope? a. the movement of molecules inside the cell b. a three-dimensional view of the surface of a membrane c. details of structures inside cells d. cells swimming in a drop of pond water.

b

When viewing a specimen through a light microscope, what is a method that scientists use to make it easier to see individual components of cells? a. a beam of electrons b. high temperatures c. special stains d. radioactive isotopes

c

Which element of the cell theory has practical applications in health care because it promotes the use of sterilization and disinfection? a. A nucleus and organelles are found in prokaryotic cells. b. A cell is the basic unit of life. c. All cells come from pre-existing cells. d. All living organisms are composed of one or more cells.

c

Which of the following observations contributed to the cell theory? Select one: a. Prokaryotic and eukaryotic cells are surrounded by a plasma membrane. b. Animal and plant cells have nuclei and organelles. c. Non-living material cannot give rise to living organisms. d. Viruses replicate.

c