Why do we need a new vaccine for Influenza every year?
A. because the virus mutates very quickly
B. because the virus is unknown
C. because the vaccine works for a short time
D. none of the answers
Select your answer:
Topics:
Cells & Body Systems Muscle Origin, Insertion, and Function Cell Membrane and Transport Stimuli and Responses in Humans Diversity Common Respiratoty Diseases First Aid Check up Enzyme Nervous & Endocrine Systems Anatomy - Muscle Contraction and Growth Agents of Disease The Cardiovascular System OCR A-level Life Processes Excretion Digestive System and Nutrition Nail Diseases and DisordersOther quiz:
Genetics › ViewThe fact that all seven of the pea plant traits studied by Mendel obeyed the principle of independent assortment most probably indicates which of the following?
A. All of the genes controlling the traits behaved as if they were on different chromosomes.
B. All of the genes controlling the traits were located on the same chromosome.
C. The diploid number of chromosomes in the pea plants was 7.
D. None of the traits obeyed the law of segregation.
Disease & Immunity › View
Name the system that will directly respond to these vaccines.
A. Excretory
B. Digestive
C. Immune
D. Endocrine