What force is created by the negative water pressure resulting from water evaporating from the stomata of a leaf?
A) cohesion
B) adhesion
C) tension
D) pressure flow
C
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How many protons are in the nucleus of a
phosphorus atom?
a. 5 b. 7 c. 10 d. 15 e. 30
If a short sequence of DNA is 5' AATTGCCGT 3', its complement is
A. 5' AAAACGCCA 3'. B. 5' TTAACGGCA 3'. C. 3' TTAAGCCGA 5'. D. 3' TTAACGGCA 5'. E. 3' TTAACGGCT 5'.
Bacteria living in a freshwater stream that are moved to salty seawater would
A. now be in a hypotonic solution. B. gain water as a result of the move. C. shrivel as a result of the move. D. now be in a isotonic solution.
Answer the following questions true (T) or false (F)
1. Laboratory experiments suggest that many of the kinds of organic molecules needed to form the first forms of life could have been made nonbiologically in Earth's early history. 2. Some of the more advanced organisms in Domains Bacteria and Archaea have a nucleus. 3. Photosynthesis was first performed by bacteria about 3.4 billion years ago.