Describe how the influenza vaccine is made in the United States. Explain the strain selection and vaccine production processes for the influenza vaccine
What will be an ideal response?
Answer: Each year a new influenza vaccine is made by taking prevalent strains (two influenza A and one influenza B) at the end of each influenza season and infecting embryonated eggs with the different strains, one at a time. The viruses are inactivated in the eggs, and all three strain types are combined as a trivalent vaccine against influenza virus.
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Organisms that grow near deep-sea volcanic vents are likely to be
A. picrophilic. B. alkylophilic. C. barophilic or barotolerant. D. acidophilic.
The MOST effective malarial control measure is to interrupt the life cycle of the parasite by eliminating the obligate host, the Anopheles mosquito
Indicate whether the statement is true or false.
Which of the following is one of Mendel's three hypotheses for explaining his observations?
a. The pairs of alleles remain together in the formation of gametes so that each gamete gets both alleles. b. Adult plants always have traits that are governed by a single pair of alleles, but the number of possible alleles varies with each trait. c. Adult plants carry a trio of genes that will determine the inheritance of each allele. d. If an adult plant has two different alleles, the alleles blend.
Each round of meiosis 1 and 2 decrease the number of chromosomes found in a cell
a. true b. false