Which type of stem cell gives rise to red and white blood cells?

a. endothelial
b. epithelial
c. hematopoietic
d. mesenchymal


Answer: c. hematopoietic

Biology & Microbiology

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Lycophytes, ferns, and horsetails disperse via:

A. sperm. B. seeds. C. fronds. D. spores. E. thalloids.

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Which of the following must leave the nucleus via the nuclear pore complexes?

A. mRNA B. Immature ribosomal subunits, tRNA, and mRNA C. Immature ribosomal subunits D. tRNA

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Describe the macroscopic anatomy of the human excretory system

What will be an ideal response?

Biology & Microbiology

Which of the following statements about Neisseria gonorrhoeae is FALSE?

A. It causes disease in humans only. B. The gonococci stick to epithelial cells via fimbriae and capsules. C. The gonococci secrete a protease that destroys secretory IgA. D. The gonococci induce lasting immunity. E. Infected women are often asymptomatic.

Biology & Microbiology