Hepatitis B virus transmitted by a finger-stick device enters the host via which portal of entry?
A) mucous membrane
B) adherence
C) skin
D) parenteral
Ans: D) parenteral
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In the early 1900s, many people, particularly in the southern U.S., suffered from infections
with parasitic hookworms. Many of these hookworms feed on blood cells of the host and thus also consume iron that is found in red blood cells. A symptom of a heavy infection is a craving to eat dirt—particularly clay-like soils with a high iron content. Thus, for these people, iron is a __________.
a. tradeoff b. constraint c. part of the organism’s niche d. nonlimiting resource
The study of which of the following diseases led to the discovery that DNA carries genetic
information? A. Pneumonia D. Spanish flu B. AIDS E. SARS C. Tuberculosis
In 1969 RH Whittaker proposed a 5 kingdom classification based mainly on?
a. Size and color of cells b. Ability to reproduce and develop c. Cell structure and how an organism derived nutrition d. Electronic microscopy and biochemisrty e. RNA sequence analysis
Once a branch point occurs, do both the branches evolve?
What will be an ideal response?