Which of the following is true of the adrenal medulla?
1.It controls sodium and water reabsorption in kidneys.
2.It releases norepinephrine into the blood.
3.It secretes sex hormones.
4.It decreases cortisol level in the blood.
2
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Blood bypasses the fetal liver through the ____
a. umbilical arteries b. umbilical veins c. ductus venosus d. foramen ovale e. ductus arteriosus
One-third of all cancer deaths are due to mutations that arise from smoking tobacco.
Answer the following statement true (T) or false (F)
Live-bearing reproduction, or viviparity, has apparently evolved
a. just three separate times. b. about 200 separate times in vertebrates alone. c. only in mammals. d. only once, although many groups lost it secondarily. e. about 15 separate times.
What are Hox and MADS genes, and what do they have in common?
What will be an ideal response?