How many electron pairs does carbon share to complete its valence shell?
A) 2
B) 3
C) 4
D) 8
C
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Compared to a solution of pH 9, a solution of pH 7 is
A. 20 times more basic. B. 20 times more acidic. C. 100 times more acidic. D. 2 times more acidic. E. 100 times more basic.
Similarities between organisms in biomes that are widely separated on the planet are an indication of:
a. invasive species becoming adapted to their new home b. morphological convergence c. recombinant DNA d. common ancestry e. founder effects
Briefly describe how ATP acts as an energy carrier in cells
What will be an ideal response?
Researchers have identified several factors that have increased the number of threatened and endangered species. Identify the causes, as defined by the percentage (%) of species affected.Use the following word bank: pollution, overexploitation, disease, exotic species, habitat loss.
A:________B:________C:________D:________E:________
What will be an ideal response?