Whose proposal of the endosymbiotic theory of mitochondrial and chloroplast origin was ultimately accepted by the grater scientific community?
A. Rudolf Virchow
B. Ignaz Semmelweis
C. Lynn Margulis
D. Theodor Schwann
Ans: C. Lynn Margulis
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Which of the following molecules inhibits bacterial transcription by prevention of promoter clearance?
A. ?-amanitin B. actinomycin D C. rifampicin D. acridine E. ethidium bromide
P, D, and Q are three genes found on a single chromosome in greyhounds. The recombination frequencies between the three genes are shown below. In which order are these genes found on the greyhound chromosome? P - D = 50%; P - Q = 20%; D - Q = 30%
A. P-Q-D B. P-D-Q C. Q-D-P D. D-P-Q E. It is impossible to determine.
The additive effect of one neuron sending many EPSPs to another neuron over a brief period of time is called spatial
summation.
Indicate whether the statement is true or false.In the following equation, rmax represents which of the following characteristics of population?
a. zero population growth
b. logistic growth
c. biotic potential
d. maximal population density