Toxic substances are dangerous because they
A. Can physically remove or tear tissues
B. Cause excessive water accumulation in tissues
C. Are usually synthetic
D. React or interfere with specific cell functions
E. Cause debilitating parasitic diseases
Answer: D
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Amphibians were the first organisms to live on land
a. True b. False
The determination that Earth was created on Oct. 22, 4004 B.C. was made by
a. Werner. d. Ussher. b. Kelvin. e. Steno. c. Buffon.
Managing crop competitors and pests has been challenging to agronomists for centuries. One approach, integrated pest management, ________
A) uses only synthetic chemical pesticides B) uses only natural pesticides C) uses no pesticides of any kind D) combines a variety of pesticides to combat the pest E) combines synthetic chemical pesticides with biocontrol techniques
Point bars are sandbars deposited in the middle of river channels.
Answer the following statement true (T) or false (F)