Which of the following choice is true in case of a micoaerophile?
A. It grows best in an anaerobic jar
B. It grows with or without oxygen
C. It needs normal atmospheric levels of oxygen
D. It requires a small amount of oxygen but won't grow at normal atmospheric levels.
E. None of the choices are correct
Answer: D. It requires a small amount of oxygen but won't grow at normal atmospheric levels.
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Many organisms grow in areas where sun and nutrition sources are poor, such as the hydrothermal vents at the bottom of the ocean. By what process do these organisms make their own food?
a. photoautotrophy b. diffusion c. chemoautotrophy d. predation
A sophisticated mechanism that has evolved in mammals for eliminating nitrogenous wastes involves
A) secretion through cell membranes. B) forming urea from combining ammonia with carbon dioxide C) producing uric acid and storing it in the body until it can be released. D) producing uric acid as an embryo and urea after birth.
The components of a nucleoside are:
a. a nitrogenous base b. a nitrogenous base and a pentose sugar c. a nitrogenous base, a pentose sugar, and a phosphate group d. a nucleotide and a phosphate group e. Both c and d
In this model, it is often difficult to determine when exactly speciation occurred due to many __________ links between species over time.
What will be an ideal response?