Answer the following questions true (T) or false (F)
1. State whether the following statement is true or false, then give your reasoning. The terminating "hairpin" loop occurs in the trp operon when sufficient tryptophan is present.
1. True; the hairpin loop terminates transcription because when tryptophan is present, it is energetically favorable to prevent more of its synthesis.
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Fossil fuels are the result of buried organisms where low oxygen levels existed
Indicate whether the statement is true or false.
The heart of amphibians has ____ chambers. The hearts of birds and mammals have ____ chambers
a. two; three b. three; four c. two; four d. three; five e. three; two
Which of the following sex-linked diseases is characterized by a waddling gait, toe walking, frequent falls, and difficulty in rising, and may appear as soon as the child starts to walk?
A) hemophilia B) fragile X syndrome C) color-blindness D) Duchenne muscular dystrophy E) None of the answer choices is true.
Plants are raised under artificial lights turned off and on by an electric clock. Some are given long periods of light, others short periods. This is an example of
A. an experiment. B. a theory. C. deductive reasoning. D. inductive reasoning. E. a hypothesis.