Which of the following is NOT a reason respiration in water is challenging?
A. Water is very dense relative to air.
B. Water holds relatively little oxygen compared to air.
C. Water moving over thin respiratory epithelial surfaces can create osmotic challenges.
D. Dessication of respiratory surfaces is a significant problem.
E. All the choices except "dessication of respiratory surfaces" are correct.
E. All the choices except "dessication of respiratory surfaces" are correct.
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A(n) ________ mycelium is a branching network of filaments that rises above the agar growth medium.
Fill in the blank(s) with the appropriate word(s).
Why are most X-linked disorders recessive?
a. X-linked dominant disorders are always fatal to females b. females only have one active X- dominant disorders would render them sterile c. dominant X-linked disorders are almost always fatal to the male embryo d. dominant X-linked disorders, regardless of their overall effect, prevent proper sperm formation e. more than one of these is the reason why most X-linked disorders are fatal
Which of the following statements about B cells is true?
A. B cells change into plasma cells after encountering an antigen and then produce antibodies. B. B cells carry receptor molecules on their cell surfaces. C. Some B cells become memory cells. D. B cells develop and mature in the bone marrow. E. All of the answer choices are correct.
Unlike eukaryotic mRNA, prokaryotic mRNA is polycistronic
Indicate whether the statement is true or false