Answer:
<h2>Yes, mammals are more closely related to reptilia or birds </h2><h3>Hope it helps </h3>
Answer: Splitting the water
Explanation:
Carbon dioxide has a regulating function in the splitting of water in photosynthesis.
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:
B
Explanation:
I've had this question before got it right.
Ancient organism remains, fossil layers, similarities among organisms alive today, similarities in DNA and similarities of embryos.
