Which of the following pathogens/diseases would be the easiest to eradicate?
A. A pathogen that mostly infects animals but also sometimes causes disease in humans.
B. A pathogen that only infects humans and rarely causes signs and symptoms.
C. A disease that is asymptomatic and is carried by a large number of people in a population.
D. A pathogen that only infects humans and causes obvious signs and symptoms.
E. A pathogen that causes disease in both animals and humans.
Ans: D. A pathogen that only infects humans and causes obvious signs and symptoms.
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If a DNA template strand has a sequence of 3? TACAATGTAGCC 5?, the RNA produced from it will be which sequence?
A. 3?TACAATGTAGCC5? B. 5?ATGTTACATCGG3? C. 5?AUGUUACAUCGG3' D. 3?AUGUUACAUCGG5? E. 3?ATGTTACATCGG5?
The uptake of water and mineral ions from the soil occurs primarily at the ____
a. endodermis b. root cap c. quiescent center d. pericycle e. root hairs
The spongy body running the length of the underside of the penis is the _____.
A. coronal ridge B. corpora cavernosa C. corpus spongiosum D. coronal sponge
Which of the following is true of radiometric dating?
A) A mineral that is 10,000 years old would best be dated with radioactive potassium. B) A mineral that is 1 billion years old would best be dated with radioactive carbon. C) Radioactive potassium-to-radon gas ratio can be used to date minerals. D) One can infer the age of a fossil by radiometric dating of the minerals found near the fossil. E) Carbon-14 decays with a half-life of 60,000 years.