Which of the following class of antibody is primarily found in external secretions?
A. IgA
B. IgD
C. IgG
D. IgE
A
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One way in which deforestation contributes to global climate change is that the conversion of forest to cropland or pasture ____.
A. decreases the amount of methane released by microbes B. increases the amount of nitrogen oxides in the air C. decreases the amount of sulfur dioxides in the air D. increases the rate at which carbon is taken up by plants E. decreases the rate at which carbon is taken up by plants
The fruit wall, or pericarp, develops from the
a. ovary wall. b. petals. c. seed coat. d. endosperm. e. receptacle.
What gametes will be produced after meiosis of the following chromosome pair? Sd = active segregation dis-torter allele, Sd+ = inactive segregation distorter allele, Rsps = response sensitive responder gene allele,
Rspi = response insensitive responder genes allele. What will be an ideal response?
What percentage of the population are children 4 years old or younger in Western Europe?
A. 2.5 B. 5 C. 10 D. 17 E. 22