How many phosphodiester bonds are needed to join 50 deoxyribonucleotides in a DNA strand?
A. 49
B. 100
C. 51
D. 50
E. 102
Answer: A
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Which is the correct summary equation of aerobic respiration?
a. C6H12O6 +H2O2 = CO2 + H2O b. C6H12O6 + O2 = CO2 + H2O + NH3 c. C6H12O6 + O2 = CO- + H2O d. H2O + NH3+ C6H12O6 = O2 + CO2 e. C6H12O6 + O2 = CO2 + H2O
Spermatogenesis
A. occurs in the seminiferous tubules. B. begins at birth. C. involves one cell dividing into 4 by mitosis. D. produces a few hundred cells per day.
The evolution of saber teeth in a number of groups of extinct carnivorous mammals is an example of
A. homoplasy caused by common descent. B. homoplasy caused by convergence. C. homology caused by common descent. D. homoplasy caused by evolutionary reversal. E. homology caused by convergence.
Why are most plants green?
A) Chlorophyll a reflects green light. B) Chlorophyll a absorbs green light. C) Chlorophyll b primarily uses green light as the source of energy for photosynthesis. D) Green helps plants blend into their environment as a sort of camouflage.