Secretion of human chorionic gonadotropin [HCG] only occur during pregnancy in the placenta. The concentration of this hormone increase rapidly during the first three months of pregnancy; the amount in the blood stream doubles every two to three days as the development of the placenta and embryo progress. The hormone reaches its maximum concentration peak around the sixth week of pregnancy and after this, its concentration decline.
your answer is A because a geometric progression is increased by a factor of 3, therefore 4x3=12 and 12x3=36.
hope this helps!!
The sequence with the correct word in place would be DNA --> Gene --> Chromosome
<h3>Organization of genetic information</h3>
The basic unit of genetic information is the gene.
Genes are made up of a base sequence of DNA.
Genes are organized into structures known as chromosomes.
Thus, DNA --> Gene ---> Chromosomes
More on genetic information can be found here: brainly.com/question/6663018
Answer:
nucleotides
Explanation:
RNA and DNA are polymers made of long chains of nucleotides.
Answer:
The CTL has specific receptors that can recognize infected or damaged cells.
Explanation:
The cytotoxic T cells (CTL) is a type of white blood cells that specifically helps in destroying virus-infected cells (also damaged cells and cancer cells).
This type of cells has a special receptor called T-cells receptors (TCR) which ones recognize specific antigens (molecule that stimulate the immune systems because are “strange” to them). Virus inside a cell could bind to a special molecule called class I MHC, this molecule moves the virus to the surface of the cell where it can be recognized by a CD8+ specific antigen-receptor of the CTL.
