Which of the following has the highest species richness? A community with
A) 34 species of high evenness.
B) 36 species with very low evenness.
C) 35 species of high evenness.
D) 33 species of low evenness.
B
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On a phylogenetic tree, distantly related species diverge from branch points nearer to the tree's:
A. base. B. branches. C. tips. D. trunk.
Which one of the following statements about the trypanosome causing African sleeping sickness does not explain why the disease has been difficult to control?
A. Trypanosomes have a protective glycoprotein coat. B. Trypanosomes have many variable antigen genes. C. Rearrangement of antigen genes takes place during the asexual cycle. D. By infesting the red blood cells, trypanosomes can "hide" from the immune system. E. Only one gene determining the antigenic nature of the glycoprotein coat is expressed at a time.
Gel electrophoresis separates DNA fragments on the basis of differences in their ________
A) A:C ratio B) length C) G:T ratio D) pH
Fats and oils contain more energy per gram than proteins or carbohydrates
Indicate whether the statement is true or false