Answer:
The primary and secondary responses are equal
Explanation:
Primary and secondary are considered to be two responses of immune to the antigen.
Primary response occurs at the first encounter between the antigen and immune. This response can be as long as 14 days depending on the antigen category.
There are two cells in the body that act as a defensive system and antibodies against antibodies.
the secondary response occurs when a person exposed to the same antigen repeatedly
Out of the choices given, the statement that is NOT true about a vocational or technical education program is; the program may take longer than a college program but focus on careers. These types of school are shorter than a college program. The correct answer is B.
Answer:
The best answer to the question: If the ice in Antartica melted, the sea level would rise about:___, would be: 200 feet.
Explanation:
According to research and data found, the possibility of either of the poles completely melting off is practically nil. The planet has not gone through just one, but several ocassions in which temperatures in the atmosphere have risen due to greenhouse gases, but in all of them, after a period of time, the balance was restored. And in none of those ocassions, did the poles melt completely. In fact, according to several geologists whose research has been published, the Earth has natural mechanisms of defense that would not permit such a thing to happen. However, some of them have asked themselves the hypothetical question of what would happen, especially to sea levels, if just one of the two poles, Antartica, melted, and the answers they have gotten have been: they would rise over 200 feet, and they would most likely cause coastal cities, and various islands, to disappear under water.
The period of development that includes the creation of the zygote, attachment to the uterine wall, and continued cell division is known as the gestation period.
The gestation period for humans is normally 9 months. The spermatozoa fuse with the ovum to form a single-celled zygote in the ampullary region of the fallopian tube.
The germinal period is initiated with germinal stage and is followed by embryonic period.
Germinal period:
The fusion of spermatozoa with the ovum to form a zygote is called fertilization. The zygote then follows mitotic division and increases in cell numbers in the route of 2, 4, 16, 32… and so on. These series of divisions are known as cleavages. The embryo of up to 32 cells is called a morula. As more cleavages take place, the morula turns into a hollow ball of cells called a blastula. The blastula is enclosed in a protective sheath called a blastocyst. The blastula gets embedded into the endometrial lining of the uterus. This is called implantation. The blastocyst develops the placenta. The placenta supplies the essential nutrients required for the development of the embryo.
Embryonic period:
The embryo is connected to the placenta through the means of an umbilical cord. The transmission of nutrients to the embryo from the placenta occurs through the umbilical cord. When the embryo is developed it is called a fetus. The fetus remains generally in a head-down position toward the cervix through which it is transferred out from the uterus. This procedure of expelling the fetus out of the mother's body is commonly known as delivery.
To know more about gestation period, refer to the following link:
brainly.com/question/26027389
#SPJ4
