If an organism has two copies of each chromosome, it is
A. aneuploidy.
B. diploid.
C. haploid.
D. tetraploid.
E. polyploidy.
B
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In this figure, the magnitude of the secondary response is due to ____________________
a. the presence of memory cells b. the presence of antibodies that remain in the body after a first-time infection c. the activity of killer T-cells d. antibodies introduced when someone receives a vaccination
The mosses, liverworts, and hornworts are
members of which group?
a. conifers b. ferns c. gymnosperms d. bryophytes e. angiosperms
Which pairs of people would provide the most useful information to geneticists, regarding the heritability of a certain trait?
A) non-twin siblings separated into different households soon after birth B) monozygotic twins separated into different households soon after birth C) non-twin siblings raised in the same household since birth D) monozygotic twins raised in the same household since birth
The primary function of the blood is
A. transportation. B. metabolism. C. increasing temperature. D. to supply the lymphatic system.