Answer: Explanation:
Sickle hemoglobin differs from normal hemoglobin by a single amino acid: valine replaces glutamate at position 6 on the surface of the beta chain. Therefore the red blood cell bends differently giving it a sickle shape
Answer:
The Fibonacci succession is the next infinite succession of natural numbers, each Fibonacci number is the sum of the two previous to it: a hurricane, the galaxies or the roses have this pattern in nature.
Explanation:
The Fibonacci spiral: an approximation of the golden spiral generated by drawing circular arcs connecting the opposite corners of the squares adjusted to the values of the succession; successively attaching squares of side 0, 1, 1, 2, 3, 5, 8, 13, 21 and 34.
Answer:
Assuming that question asking the measures taken by the U. S. government in past the correct answer would be - opened a station for immigrants on Ellis Island in New York.
Explanation:
To deal with the elevation of the numbers of immigrants the U. S. government established an immigration station or point on Ellis Island located in New York City.
This station was opened in the year 1892. It was an entrance door for immigrants that come into the United States. South and Eastern Europe people were the majority of the immigrants that come these 60 years.
Thus, the correct answer is - opened a station for immigrants on Ellis Island in New York.
Answer:
The statement C that says ''is derived from the inner cell mass'' is false.
Explanation:
The trophoblast is a structure composed of a set of cells (cytotrophoblast and syncytiotrophoblast), which are shaping the outer layer surrounding a blastocyst, during the earliest stages of embryonic development that mammals pass.
The trophoblast provides nutritive molecules to the developing embryo and facilitates its implantation to the uterine wall due to its ability to erode the tissues of the uterus, that is, it is responsible for making it possible for the embryo to be implanted in the uterine endometrium. Thus, the blast can join the cavity formed by the uterine wall, where it will absorb nutrients from the fluid from the mother.
During the third week, embryonic development includes the development of the trophoblast. At the beginning, the primary villi are formed by the internal cytotrophoblast which is surrounded by the outer layer of syncytiotrophoblast. Then, the cells found in the embryonic mesoderm are directed to the primary villous in the third week of gestation and when it ends, the mesodermal cells begin to be singled out to form blood vessel cells.
