Yes I suppose they must. if the ground and crops all froze we wouldn't have food and if there was no more air we could not breathe and if there was no more sun we would freeze and if there was no more water we would die.
Answer:an understanding that species share a common ancestor
Explanation:
Took it on edge
all about Living Things
Explanation:Characteristics of Living Things
Living things are made of cells. Cells are the basic building blocks of living things. ...
Living things have movement. This movement can be quick or very slow. ...
All living things have a metabolism. ...
Living things grow. ...
Response to environment. ...
Reproduction.
Answer:
d. Placental hormones are antagonistic to insulin, resulting in insulin resistance.
Explanation:
The placenta secretes many hormones out of which estrogen, progesterone, and human placental lactogen have an antagonistic effect on insulin. Insulin from the pancreas triggers the uptake of glucose by cells and lowers down the blood glucose level. Increased secretion of estrogen, progesterone, and human placental lactogen during late pregnancy by the placenta makes the cells non-responsive or reduces their sensitivity to the presence of insulin. This is called insulin resistance.
When cells do not respond to the presence of insulin by taking up the glucose, the blood glucose levels are increased. This effect increases the availability of glucose to the fetus as the circulating glucose is transported to the fetus.
The correct answers are:
d. Although most mammals, including humans, are not able to digest the milk sugar, lactose, after infancy, the ancestors of northern and western Europeans relied on dairy products as an important part of their food supply;
e. When other food sources were in low supply, mutations that allowed the expression of the enzyme lactase to persist past childhood conveyed an advantage to adults who were able to include dairy products in their diet.;
The humans from Northern and Western Europe, unlike the other people, lived in conditions where very often the food sources were scarce. With the domestication of the animals, especially the cows, goats, and sheep, the humans in this regions started to use the milk from these animals in times of crises. Over time their organisms started to become more prone to digesting the milk, thus having less and less problems with the lactose. Also, the people who were able to tolerate the dairy diet were seen as having advantageous traits, thus became more favorable for mating, which gradually increased and made dominant the population that is able to have dairy diet.
