Which of the following would be most effective in reducing the amount of CO2 in the atmosphere?
A) cyanobacteria
B) anaerobic microbes
C) heterotrophic organisms
D) fungi
E) nitrogen fixers
A
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True or false: Freshwater flatworms and earthworms are similar in that their excretory systems reabsorb electrolytes and eliminate concentrated urine
A. true B. false
A bulbourethral gland secretes
A) sperm. B) a mucus-like fluid. C) blood. D) saliva.
During moderate but prolonged exercise, most
of the energy for contraction is supplied by a. creatine phosphate. b. aerobic respiration. c. anaerobic respiration. d. fermentation. e. glycolysis
In a certain population, the frequency of a dominant allele is represented by p = 0.7, and the frequency of the recessive allele is represented by 0.3. What is the frequency of the heterozygous genotype?
A. 1 B. 0.42 C. 0.5 D. 0.01