The growth of bacterial cultures is best described as
A) arithmetic growth.
B) lag growth.
C) logarithmic growth.
D) cell division.
E) replication.
C
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A germfree mouse that is not born by cesarean section is not a suitable animal model for investigating the interaction between a host and one type of bacteria.
Answer the following statement true (T) or false (F)
The Carboniferous period included
A. the development of large coal beds. B. flying insects with wing spans up to 75 centimeters. C. ferns and early plants that grew up to 40 meters in height. D. All of the answer choices are correct. E. sediment-dwelling invertebrates.
In Thomas Hunt Morgan's experiments, the ratio of red-eyed flies to white-eyed flies appeared to follow a simple Mendelian pattern of inheritance. What observation(s) did he make that led to his conclusion that the white-eyed trait was actually not a simple Mendelian trait?
A. He was able to correlate the expression of white eyes to the inheritance of an X chromosome. B. He was able to correlate the expression of white eyes to the inheritance of an X chromosome because only F2 males had white eyes and the trait is recessive. C. He saw that only males had white eyes. D. He observed that the white-eyed trait was recessive. E. He was able to correlate the expression of white eyes to the inheritance of a Y chromosome because only F2 males had white eyes and the trait is recessive.
The bulk of the reabsorption of useful materials by the kidney takes place in the
A. renal corpuscle. B. proximal convoluted tubule. C. collecting ducts. D. distal convoluted tubule. E. loop of Henle.