A karyotype of a baby born with abnormalities indicates that the child has 47 chromosomes. What conclusion could you draw?
A. The developing embryo was exposed to a teratogen between weeks 3 and 4 after fertilization.
B. The zygote was exposed to a mutagen.
C. The baby has Turner syndrome.
D. Nondisjunction during meiosis affected either the egg or sperm.
E. The mother was probably over the age of 35 when she conceived.
D. Nondisjunction during meiosis affected either the egg or sperm.
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The dura mater is the outermost layer of the meninges.
Answer the following statement true (T) or false (F)
Nerve fibers are insulated from one another by ________.
A. blood vessels B. epineurium C. endoneurium D. perineurium E. fascicles
Which of the following is NOT a function of the urinary system?
A. It is involved in the production of white blood cells. B. It is involved in regulating blood concentration of Ca2+. C. It is involved in the regulation of blood pressure. D. It is involved in the production of red blood cells.
All of the following are layers of hair except which one?
A. Inner medulla B. Outer cortex C. Outer cuticle D. Middle cortex