Macromolecules formed from a number of monomers are called ____________________
Fill in the blanks with correct word
polymers
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Primary pollutants are
A. chemicals or substances emitted directly into the air. B. those formed from reactions with other pollutants in the atmosphere. C. found only in stratospheric ozone. D. also known as natural pollutants. E. found only in fossil fuels.
Magnetism results from the spin of electrons in some solids
a. True b. False
The unique preservation of soft-bodied fauna in the Burgess Shale occurred because ____
a. animals and plants were carried by turbidity flows to aerobic deep-sea conditions b. animals and plants were transported and buried in anaerobic conditions c. bacteria were able to destroy organisms at the burial site d. the organisms were neither compressed nor compacted e. animals with hard parts were deposited immediately above the shale
Most stream channels in desert regions have perennial flow
a. True b. False Indicate whether the statement is true or false