Mutations in the TATA box increase the rate of transcription
__________________ Indicate whether the statement is true or false.
False - decrease
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In reabsorption, ____
a. plasma proteins are returned to the blood b. excess hydrogen ions are removed from the blood c. excess water is passed on to the urine d. nutrients and salts are selectively returned to the blood e. drugs and foreign substances are passed into the urine
Which of the following accurately compares active hyperemia to reactive hyperemia?
A) One is caused by an increase in metabolites, the other to a decrease in perfusion pressure. B) One is an increase in blood flow, the other is a decrease. C) One is caused by increased metabolic activity, the other in response to an increase in metabolites from an occlusion to blood flow. D) One involves vasodilation, the other vasoconstriction. E) One is an intrinsic response, the other an extrinsic response
A base-pair substitution may alter a protein by changing an amino acid or by introducing a(n) _____________________.
Fill in the blank(s) with the appropriate word(s).
Answer the following statements true (T) or false (F)
1. All materials passing from one hyphal cell to another must diffuse across the septal wall. 2. Conidia are sexual spores produced by mushrooms. 3. Lichens are monophyletic. 4. Many kinds of ascomycetes and basidiomycetes have lost the ability to reproduce sexually.