When we look at infectious disease statistics for the global human population as a whole, we find the number one cause of death is
A) malaria.
B) parasitic diseases such as worms.
C) respiratory infections.
D) heart disease.
Ans: C) respiratory infections.
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What fraction of all of the organic carbon on Earth results from microbial fixation of carbon dioxide in the oceans?
A. About 1/2 B. About 3/4 C. About 1/4 D. About 1/8
Which of the following animals do NOT use echolocation?
a. Bats b. Porpoises c. Dolphins d. Moths e. Whales
The structure where parts of ribosomes form before passing into the cytoplasm is the ____
a. nucleus b. nuclear membrane c. Golgi body d. nucleolus e. chromosome
A cell is dividing by binary fission. What can you conclude?
a. Mitosis has taken place without cytokinesis. b. Homologous chromosomes have already paired. c. The cyclin-Cdk complex is no longer phosphorylating enzymes. d. The cell cycle is out of control. e. The cell is prokaryotic.