H H II II
threonine - proline -N-C-0
lys
CH2 o
1
CH2 - C OH
glutamic acid
Normal
hemoglobin
Amino acid
substitution
H н но
II II
threonine-proline —N-C-0-lys
H3C - CH - CH3
valine
Sickle cell
hemoglobin
1. What is the difference between the normal hemoglobin and sickle cell hemoglobin?
2. What portion of the normal hemoglobin is identical to the sickle cell hemoglobin?
3. Write down two questions that you have about each of the hemoglobin based on your observations.

Ineed the answer asap. in order to be considered alive, an organism must simultaneously possess the characteristics of homeostasis, heredity, cells, reproduction, and

Plz will mark! the diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Elephants in the savanna regions of africa dig holes in dried up river beds to reach water lying just below the surface. these holes provide drinking water for other animals as well. so, without the elephants, many animals might otherwise die from lack of water during the dry season. the location in which the elephants live is an example of a/n and the role they play in creating water holes is an example of a a) ecosystem; habitat b) community; niche c) habitat; niche d) niche; habitat