Which of the following is known to use tsetse flies as intermediate hosts?
A. Entameoba histolytica
B. Trypanosoma brucei gambiense
C. Histoplasma capsulatum
D. Giardia lamblia
Answer: B
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The zygote produced during double fertilization is ____
a. diploid b. tetraploid c. polyploid d. triploid e. haploid
Clues from geology and paleontology suggest that simple cells or their precursors arose about.
A. six billion years ago. B. six million years ago. C. four billion years ago. D. four million years ago. E. one million years ago.
Answer the following questions true (T) or false (F)
1. By themselves, soaps have only degerming activity, not antimicrobial activity. 2. Paul Erhlich discovered the first antibiotic. 3. Antisense nucleic acids interfere with protein synthesis.
Which of the following is NOT a goal of recombinant DNA technology?
A) combining genetic material from more than one organism to produce new useful organisms B) making it possible to clone humans C) eliminating undesirable traits from livestock or crops D) being able to remove or correct damaging traits in humans E) creating organisms capable of producing useful products