Nutrients deposited on leaves as dust and materials leached from leaves through insect action are most often transported to the forest floor by
A) animal activity.
B) throughfall.
C) wind action.
D) sap flow.
B
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Answer the following statements true (T) or false (F)
1. Of the 20 amino acids in all organisms, essential amino acids are obtained by food consumption. 2. If a protein is denatured, its structure has been changed enough to make the protein nonfunctional. 3. Proteins store the genetic information of the cell and transmit it to the next generation. 4. When Herceptin medication is used to stop the excessive action of receptor proteins in breast cancer cells, slowing their division, the receptor proteins are within the cell nucleus where the cell is regulated. 5. Endosymbiosis theory is proposed in large part because of the resemblance of mitochondria and chloroplast structures to prokaryotes.
Which of the following is not a phenotypic method of identification?
A. Antibody response B. Gram stain reaction C. Morphology D. Endospore production E. Acid-fast reaction
Muscular contraction moves food through the alimentary canal by a process called ________
A) propulsion B) active transport C) peristalsis D) swallowing
Which of the following statements is INCORRECT regarding prokaryotic cells?
A) Their DNA is not enclosed within a membrane. B) They lack membrane-enclosed organelles. C) They typically have a circular chromosome. D) They reproduce by binary fission. E) They lack a plasma membrane.