The main weight-bearing bone in the lower extremities is known as the ________
A) fibula
B) tibia
C) pelvis
D) femur
D
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When climax and subclimax vegetation combine in different parts of a(n) ________, they provide habitats for a large number of plant and animal species
Fill in the blank(s) with correct word
After one round of division (Meiosis I) are the cells HAPLOID or DIPLOID?
A. They are haploid
B. They are diploid
C. One is haploid and one is diploid
D. They are triploid
Chemically or thermally modified toxins that are used for vaccination are called (adjuvants/antigens/toxoids)
What will be an ideal response?
Why would the Sabin oral polio vaccine need to be eliminated as we get closer and closer to eradication of the polio virus?
A. Since it is a live, attenuated viral vaccine, there's always the chance it could revert back into a pathogenic state by mutation. This would introduce new strains still capable of causing the illness into human populations, thwarting elimination. B. The Sabin vaccine is cheaper than the Salk (killed virus) vaccine, but it isn't as effective at producing a protective response. We'll need to shift to the more effective Salk vaccine worldwide eventually to complete the eradication process. C. The Salk vaccine is far cheaper than the Sabin vaccine. To effectively eradicate polio, we'll need to shift all of our resources into the cheapest and easiest to deliver vaccine possible. That is the Salk vaccine. D. The Sabin vaccine can only be administered to human beings. We need to vaccinate bird populations as well to effectively control the spread of polio. Birds are a natural reservoir for the virus.