The end of the germinal period is marked by the of the in the wall of the uterus

Blank 1: Implantation

Blank 2: Blastocyst

Explanation: Blastocyst is the ball of cells with hollow space, termed as blastocyst cavity. It gets implanted on the walls of the uterus, called as endometrium. This happens on the seventh day of the fertilization, which marks the end of germinal period.

Germinal period is the time of 3-4 days when fertilized cells divide and reach the uterus for implantation.

advantage of using stem cells in medical research:

1.       it provides medical benefits in the fields of therapeutic cloning and regenerative medicine.

2. it provides great potential for discovering treatments and cures to a variety of diseases including parkinson disease, spinal cord injuries, diabetes, alzheimer’s disease and many more.

3. limbs and organ could be grown in lab from stem cells and then used in transplant or treat illness.

the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.