The mechanism by which antigen-reactive cells respond to foreign antigens while ignoring self-antigens is called clonal
A) selection.
B) deletion.
C) anergy.
D) expansion.
Answer: A
Biology & Microbiology
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A haplotype is a group of tightly linked SNPs or genetic markers, and a haplogroup is a collection of haplotypes that came from a common ancestor.
Answer the following statement(s) true (T) or false (F)
Biology & Microbiology
Which of the following do methanogens not use to form methane?
A. Formate B. Acetate C. Phosphate D. Carbon dioxide
Biology & Microbiology
The percentage of recombination associated with independent assortment should approximate 50%
Indicate whether the statement is true or false
Biology & Microbiology
Circulatory systems ____
a. are found in all animals b. result in slow distribution of nutrients and gases c. include one or more hearts d. are always closed systems e. are found in cnidarians and flatworms
Biology & Microbiology