Our civilization's lifetime needs to be considered in obtaining a realistic estimate of the number of civilizations that we can communicate with in our galaxy

a. True
b. False
Indicate whether the statement is true or false


True

Biology & Microbiology

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Explain how, when improper base pairing escapes repair by the proofreading system, cells are able to detect and repair

mutations. What will be an ideal response?

Biology & Microbiology

Fungi are different from plants primarily because they

a) are heterotrophic b) contain chlorophyll c) are nonmotile d) have cell walls

Biology & Microbiology

The ________ scale is used to measure concentrations of hydrogen ions in a solution.

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

Biology & Microbiology

What important resource do Schwann cells and oligodendrocytes provide to neurons?

A. Ca2+ currents B. Oxygen C. Nutrients D. Physical strength from microtubules E. Insulating layers of membrane

Biology & Microbiology