Sickle cell anemia is caused by a mutation that causes the protein hemoglobin to be (built) incorrectly. The consequence of this is that the "sickle" cells can block the flow of blood in small blood vessels (capillaries).
A mutation in the original DNA causes a change in the amino acid sequence, resulting in a misshapen protein molecule.
O True
O False

Dr. kaylan is an ecologist who studies bird behavior. she sets up an experiment to test which type of food crows are most likely to eat when given a choice between walnuts, corn, and sunflower seeds. to perform her experiment, dr. kaylan places three food bins in an area frequented by cows. each bin contains one of the three food types. then, she measures how much of each food type is eaten every day for a month and summarizes the results of her experiment in the pie chart below. based on her results, dr. kaylan concludes that crows choose to eat corn more frequently than other food sources because it has a higher nutritional value. what is a reasonable alternate conclusion that can be drawn from dr. kaylan's data

Blood stem cells may develop into any kind of human blood cells. what kind of stem cells are blood stem cells? a. multipotent stem cells o b. totipotent stem cells o c. pluripotent stem cells o d. unipotent stem cells

Identify the structure in organisms that do not have kidneys that is adapted to regulate water balance