A benign tumor is usually not life-threatening

Indicate whether the statement is true or false.


T

Biology & Microbiology

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The two major categories of extracellular signal molecules that bind to cell surface receptors are ____

a. peptide hormones and steroid hormones b. steroid hormones and neurotransmitters c. neurotransmitters and vitamins d. growth hormones and vitamins e. peptide hormones and neurotransmitters

Biology & Microbiology

_________________ helps to maintain the viscosity of the plasma membrane.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

A blood alcohol concentration greater than ____ may be fatal

a. 0.08 per milliliter b. 0.4 per milliliter c. 0.02 per milliliter d. 0.05 per milliliter e. 0.2 per milliliter

Biology & Microbiology

In the vascular bundles of most eudicot stems, primary phloem differentiates toward the ________of the stem, while primary xylem differentiates toward the ________of the stem.

A. middle; middle B. cork cambium; vascular cambium C. middle; outside D. shoot tip; roots E. outside; middle

Biology & Microbiology