The similarity in the evolutionary origins of mitochondria and chloroplasts has led to the development of the ________, which proposed that they were originally bacteria.
Fill in the blank(s) with the appropriate word(s).
endosymbiont theory
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Vertebrate cells possess a protein that binds to clusters of 5-methylcytosine and ensures the gene will stay in the "off" position. This control of gene regulation is a result of
A. translation. B. enhancer expression. C. methylation. D. promoter expression. E. operator suppression.
Exoskeletons are most characteristic of
a. Mollusca b. Arthropoda c. Nematoda d. Chordata e. Annelida
Members of the Protista and Bacteria are similar in that both
A. are composed of prokaryotic cells. B. groups contains some autotrophic organisms. C. groups have cells that contain membranous organelles. D. groups are composed of cells of equivalent size.
White blood cells are a type of
A) Connective tissue B) Epithelial tissue C) Muscle tissue D) Nervous tissue