Diploid cells ____________________
a. have a complete set of homologous chromosomes
b. do not have homologous chromosomes
c. have 48 chromosomes
d. undergo crossing over of homologous chromosomes during mitosis
A
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The larva in Figure 31-4 is:
A. a veliger.
B. a glochidium.
C. a trochophore.
D. a nauplius.
E. a pupa.
Streptococcus pyogenes is one of the most pathogenic microorganisms to human. Which of the following virulence factors produced by this organism can destroy both RBC and WBC?
A. Streptolysin B. Streptokinase C. Hemolysin D. Leukocidin E. More than one of the above answers are correct
Bioremediation is the process of using organisms to clean up toxic, hazardous compounds by degrading them to less harmful substances.
Answer the following statement true (T) or false (F)
You are examining a new animal species. You find that you can pass a line through any longitudinal plane and find equal halves. Evaluate the symmetry of this animal.
A. bilateral. B. radial. C. spherical.