Which of the following types of cells is matched with the wrong stem cell category?
A. embryonic stem cells, pluripotent
B. embryonic germ cells, pluripotent
C. hematopoetic stem cells, multipotent
D. lymphoid progenitor, unipotent
E. zygote, totipotent
D. lymphoid progenitor, unipotent
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The development of septa in the hyphae of fungi was an important evolutionary step. Why?
A. If a hypha is damaged, fungi can seal septa pores to prevent cytoplasmic leakage. B. If a hypha is damaged, septa can secrete chemicals to attract symbiotic cyanobacteria. C. Septa can produce fungal spores during both sexual and asexual reproduction. D. Septa can produce different fungal mating types that aid in sexual reproduction.
Exposure to benzene is linked to ____
a. leukemia b. lung cancer c. bladder cancer d. skin cancer e. liver cancer
A ________ is a DNA molecule used in hybridization reactions to detect the presence of a particular gene in separated DNA fragments.
A. blot B. vector C. probe D. plasmid
The only class of antibody that can cross the placenta is
A. IgA. B. IgD. C. IgG. D. IgE.