Some anoxygenic photosynthetic bacteria use ________ as their electron source.
A. sulfur
B. hydrogen
C. hydrogen sulfide
D. All of these choices are correct.
Answer: D
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Which of the following is not involved in plant development?
A. active migration of cells B. cell division C. adhesion among cells D. adsorption of water and nutrients E. differentiation into distinct cell types
An antibody_____ provides a measure of the quantity of antibodies in the serum.
Fill in the blank(s) with the appropriate word(s).
A giant specimen of the multinucleate slime mold Physarum polycephalum had a surface area greater than 5.5 m2 but was only 1.1 mm in thickness. This is most likely what type of slime mold?
What will be an ideal response?
Hydrogen bonds may form between oxygen of one water molecule and ________ of another water molecule
Fill in the blank(s) with correct word