What event will most likely create an emerging disease?
a. The host species goes extinct
b. The composition of the community changes.
c. The virus reproduces very quickly.
d. The mutation alters the viral genome.
e. A hundred years passing since its first appearance.
d
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The polypeptide-making organelles, which consist of protein combined with RNA, are called
A. ribosomes. B. Golgi bodies. C. lysosomes. D. centrosomes. E. mitochondria.
Most of the carbon dioxide in the blood of humans is transported
A. attached to hemoglobin in plasma. B. as bicarbonate ion in plasma. C. as carbonic acid. D. attached to hemoglobin in red blood cells. E. as dissolved CO2 in plasma.
If an average female A. afarensis weighed 24 kg, what would you estimate the weight of an average male to be?
A) 24 kg B) 18 kg C) 36 kg D) 66 kg
In her biology class, Natasha has been asked to complete a strand of DNA with the appropriate nucleotides. If half of the strand is A-T-C-C-G-A-T-C, what would she write for the other half?
A) T-A-G-C-C-T-A-C B) T-U-G-G-C-T-U-G C) T-U-G-C-G-U-A-G D) T-A-G-G-C-T-A-G