As a physician listens to the heart of a human patient, he hears an an atypical "lub" sound. Which part of the heart might be malfunctioning?
A. the semiliunar valves
B. the AV valves
C. the right ventricle
D. the right atrium
Answer: B
Biology & Microbiology
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Which of the following is a characteristic associated with secondary antibody responses?
A. Shorter lag phase B. Higher antibody affinity C. Higher antibody titer D. All of the choices are correct.
Biology & Microbiology
In a dihybrid cross, if the resulting ratios are 1:1:1:1, what are the genotypes of the parents?
A. GgRr x ggrr B. GgRr x GgRr C. GGRR x ggrr D. GG x RR E. Gg x Rr
Biology & Microbiology
The cell itself begins to elongate during which phase of meiosis?
a. prophase I b. metaphase I c. anaphase I d. telophase I e. metaphase II
Biology & Microbiology
What is the allele frequency of q in a population with genotypic frequencies of P = 0.3, H = 0.4, and Q = 0.3?
A) 0.3 B) 0.5 C) 0.6 D) 0.9
Biology & Microbiology