64
After an hour, the level of water in the thistle funnel will
- A. rise
- B. fall
- C. remain the same
- D. double
65
The cytoplasm of the cell is considered a very important component because it
- A. regulates the amount of energy in the cell
- B. suspends all cell organelles.
- C. is the outermost part of the cell
- D. is solely responsible for cell division
66
A beaker of pond water containing few specimens of Euglena was placed in a dark room for two weeks. At the end of this period, the specimens of Euglena were still alive because they were
- A. able to carry out holozoic nutrition.
- B. able to carry out photosynthesis using carbon dioxide in the pond water
- C. better adapted to life in darkness than to life in light
- D. not overcrowded
67
Viruses are economically important because they?
- A. do not have cell structures
- B. can only reproduce inside living cells.
- C. cause diseases in plants and animals
- D. exist as crystals outside living cells
68
A group of closely related organisms capable of interbreeding to produce fertile offspring are known as members of a
- A. kingdom
- B. class
- C. family
- D. species