What is a frustule?

A) The by-product of photosynthesis in diatoms
B) The rigid cell wall of a diatom
C) A microscopic phage that attacks diatoms
D) None of these choices


B

Environmental & Atmospheric Sciences

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Growing sugar beets for sugar, as an alternative to importing sugar made from sugar cane, is an example of

A) import substitution. B) a quaternary sector activity. C) flexible production. D) vertical disintegration. E) deindustrialization.

Environmental & Atmospheric Sciences

Sediments are called ________ when they contain at least ________ biogenous sediments

a. terrigenous; 20% b. oozes; 70% c. terrigenous; 30% d. oozes; 30%

Environmental & Atmospheric Sciences

Which data structure stores raster data as a matrix and writes the cell values into a file by row and column?

A. quad tree B. cell by cell C. run length code D. none of these is correct

Environmental & Atmospheric Sciences

Cool stars evolve much more quickly than do hot stars

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences