Which portal of entry is the most commonly used by pathogens?
A. gastrointestinal
B. urogenital
C. skin
D. respiratory
E. They are all equally used as portals.
Answer: D
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Tay-Sachs disease affects in 1 in 3,600 Ashkenazim births. The value of q2 is
A) 0.1. B) 0.05. C) 0.017. D) 0.0003.
Gametes are also called which of the following?
a. body cells b. somatic cells c. sperm and egg cells d. diploid cells
The second law of thermodynamics states that ____
a. energy can be transformed into matter, and because of this, something is obtained for nothing b. energy can be destroyed during nuclear reactions such as those that occur inside the sun c. if energy is gained by one region of the universe, another place in the universe also must gain energy in order to maintain the balance of nature d. energy tends to flow from concentrated to less concentrated forms e. energy tends to be stable over time
The above figure represents ____, a group of
parasitic fungi that are killing amphibians around the world. a. Chytrids b. Ascomycetes c. Basidiomycetes d. Glomeromycetes e. Zygomycetes