Researchers studying parental care in 20 female robins found that every female robin would place a recently collected worm into
the first open mouth she saw in her nest. It appeared that the sight of an open mouth triggered the female bird's feeding behavior. To test this hypothesis, a robotic baby robin was added to every one of the 20 nests. The robot baby always had its mouth open, and the female robin always fed it first. We can conclude that _________
The correct answer is; the open mouth of a baby robin is seen as a sign stimulus for the female robin (parent), and that the open mouth is the impending cause for her behavior.
D. Lactose is absorbed intact and transported through the portal vein to the liver.
Explanation:
Lactose is a disaccharide. It is a sugar composed of galactose and glucose subunits and has the molecular formula C₁₂H₂₂O₁₁. Lactose as a disaccharide can never be absorbed just like that. It needs to be broken down into monosaccharides first.
It is important to receive data from three separate locations because the more we know about the seismic waves and the places that they are more we gain for learning about them.
