Which of the following chemicals has been
shown to cause frogs that are genetically male
to develop male and female reproductive
structures?
a. DDT
b. phthalate
c. PCB
d. atrazine
e. glyphosate
D
You might also like to view...
Which digestive structure is a J shaped muscular sac that mixes food with gastric juices?
a. Esophagus b. Pharynx c. Large intestine d. Small intestine e. Stomach
Which cellular component is considered an organelle?
a. DNA b. transport proteins c. plasma membrane d. flagella e. ribosomes
These skin cells fight infections: ________
A) fibroblasts B) melanocytes C) macrophages D) neuroglia
Based on the figure above, showing fetal (
A) and adult (B) oxygen-hemoglobin saturation curves, which of the following conclusions is true? A) The mother binds oxygen with greater affinity than the fetus. B) Adult saturation occurs at lower partial pressures of oxygen than fetal saturation does. C) At 50 percent saturation, fetal blood will have a higher affinity for oxygen than adult blood will. D) As the partial pressure of oxygen increases, adult hemoglobin approaches saturation faster than fetal hemoglobin does.