One reason organic farming is used is because in contrast to other farming methods certain inorganic fertilizers may be easily:
A. leached from soils
B. bound by soil particles
C. not useful as minerals at all
D. lack the essential minerals needed for plant growth
E. too high acid content
A. leached from soils
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The tertiary structure of a protein is ____
a. the amino acid sequence in a polypeptide chain b. generated by the formation of bonds between amino acids c. formed by a protein region folding on itself d. formed by the interaction of two or more polypeptide chain e. generated by bonding and folding of ribosomes attached to the endoplasmic reticulum
Which of the following is an example of an echinoderm?
a. Frog b. Sand dollar c. Ant d. Crab e. Centipede
What are microtubules
Fill in the blank(s) with the appropriate word(s).
The Hawaiian islands are a great showcase of evolution because of intense
A) ecological isolation and sympatric speciation. B) adaptive radiation and allopatric speciation. C) allopolyploidy and sympatric speciation. D) cross-specific mating and reinforcement. E) hybrid vigor and allopatric speciation.