If the sperm cell fertilises the ovum, and implantation does not occur, then the corpus luteum degenerates and it turns into corpus albicans, stopping progesterone secretion. If fertilisation occurs and implantation also, the syncytiotrophoblast, the "root part" of the blastocyst (one of the early structures originated from the zygote), produces a hormone that is called <span>human chorionic gonadotropin (hCG). The hCG is what makes the corpus luteum keep secreting progesterone and maintain itself. The progesterone will then help keep the endometrium and, therefore, allow the development of the embryo to happen.</span>
Answer:
T cells are born from hematopoietic stem cells, found in the bone marrow. Developing T cells then migrate to the thymus gland to develop (or mature). T cells derive their name from the thymus.
Explanation:
1. The producers in this food web are the tree, plant, and bush in the bottom right.
2. The primary consumers are the giraffe, rhino, bug, mouse, and deer.
3. Three secondary consumers are the bird, fox, and monkey.
4. Three tertiary consumers the skunk and whatever that thing is between the monkey and fox (the image is blurry).
5. Two quaternary consumers are the vulture and the monkey.
Answer:
Explanation:
Yes this would make sense because of the way turtles are more or less in the grounds of the sand.
No, it shall not. Due to the fact that they can work with cooler and warmer weather when developing.
Yes, no that people are in charge of where turtles would develop, they can change temp at their will, and they know forecasts. This is where they get the upper hand
