Which of the following characteristics are representative of the bacterium Listeria? (Check all that apply.)
A. Listeria has a catalase enzyme.
B. Listeria is a facultative anaerobe.
C. Listeria is nonmotile.
D. Listeria is a Gram-positive rod.
Answer: D
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Heterozygotes with the genotype HbA/HbS have ____
a. sickle cell anemia b. malaria c. blood type AS d. Fanconi's anemia e. sickle cell trait
The point at which the rate that a deleterious allele is being eliminated from a population by natural selection is in equilibrium with the rate at which the deleterious allele is being replaced by a new mutation is termed ________
A) mutation-dependent selection B) frequency-dependent selection C) mutation-dependent equilibrium D) mutation-selection balance
The process of decomposition releases ________ to bacteria and fungi
A) oxygen B) energy C) glucose D) protein
All of the following are a form of potential energy that can be used by a cell EXCEPT
A. concentration gradient. B. ATP. C. NADH. D. nitrogen. E. an electrical/ion gradient.