Maybe because that person is just using you and the fact they use u bc u don’t see it till later
Answer;
Primitive streak.
At the onset of the embryonic period, the primitive streak appears. It will eventually become the neural tube.
Explanation;
The primitive streak is a transient structure which forms on day 15 of human development.
It marks the start of gastrulation; the process in which the inner cell mass in converted into the trilaminar embryonic disc.
It originates from the anterior epiblast.
The shape of DNA is known as the double helix. The double helix is a description of the molecular shape of a double-stranded DNA molecule. Hope this helps!
