The production of new blood cells requires the activity of ________.

Fill in the blank(s) with the appropriate word(s).


Answer: stem cells in the red marrow

Biology & Microbiology

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Bacterial infections have become much more of a threat to human health due to which of the following?

A. the increased use of antibiotics B. an increase in acquired antibiotic resistance by innocuous strains C. horizontal transfer of pathogenicity D. an increased use of antibiotics coupled with an increase in acquired antibiotic resistance by innocuous strains E. an increased use of antibiotics, horizontal transfer of pathogenicity, and an increase in acquired antibiotic resistance by innocuous strains

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Blue flower color (B allele) is dominant to white (b allele). If a population of plants in Hardy-Weinberg equilibrium contains white flowers (bb) at a frequency of 0.04, what is the frequency of the blue flower allele (B)?

A. 0.2 or 20% B. 0.64 or 64% C. 0.32 or 32% D. 0.8 or 80% E. 0.96 or 96%

Biology & Microbiology

Describe the structure of a mitochondrion and relate to ATP production. What will be an ideal response?

Biology & Microbiology

Mammalian red blood cells:a

are phagocytic. b. contain a lobed nucleus. c. have a one-day lifespan. d. are produced in the liver. e. are produced in response to erythropoietin

Biology & Microbiology