Which of the following best describes the properties of the elements?
A) Chemical and physical properties vary in a systematic way as one moves across a row of the periodic table.
B) Chemical and physical properties vary in a systematic way as one moves down a column of the periodic table.
C) both a and b
D) neither a nor b
C
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Which is not a dominate delta type?
a. River-dominant b. Tide-dominant c. Current-dominant d. Wave-dominant
Which of the following best matches the description?Increases in the amount of material at successively higher trophic levels.
A. macronutrients B. organophosphate C. micronutrients D. chlorinated hydrocarbon E. biomagnification F. biocide G. persistent pesticide H. rodenticide I. micronutrient J. pheromone K. hard pesticide L. herbicide M. soft pesticide N. weed O. auxin P. fungicide Q. macronutrient
Many African rivers do not have bridges for transportation across them, so they rely on ferry boats. Traffic jams and bottlenecks at these crossings can be backed up and take several days to clear
Indicate whether the statement is true or false
Plants that have developed mechanisms to combat drought are known as ____
a. driophytes b. xerophytes c. trilobytes d. trogolodytes e. epiphytes