The reason for fetal globin chain switching is that
A) a fetus has four alpha globin chains and a newborn has four beta globin chains.
B) a fetus's blood is clear until the sixth month and then globin chains turn it red.
C) the newborn needs more iron than the fetus or embryo.
D) the embryo and fetus receive different concentrations of oxygen compared to after birth.
D) the embryo and fetus receive different concentrations of oxygen compared to after birth.
You might also like to view...
Encephalitis caused by arboviruses involves the development of
A. fever, headache, and rash. B. myalgia and orbital pain. C. coma, convulsions, and paralysis in severe cases. D. muscle aches and joint stiffness. E. All of the choices are correct.
Two members of the same species compete for a limited resource, resulting in equal sharing of the limited resource
What is this called? a. interspecific scramble competition b. intraspecific scramble competition c. interspecific contest competition d. intraspecific contest competition e. density-independent competition
Which of the following best describes IgM antibodies?
A) They cause basophils and eosinophils to degranulate. B) They are the most common type of antibody in the blood during the initial stages of an immune response. C) They are the antibody class found in body secretions. D) They interact with phagocytes and NK cells. E) They can cross the placenta to provide passive immunity.
symbiotic mycorrhizae
What will be an ideal response?