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:
On his visit to the Galapagos Islands, Charles Darwin discovered several species of finches that varied from island to island, which helped him to develop his theory of natural selection.
Darwin's finches are a classical example of an adaptive radiation. Their common ancestor arrived on the Galapagos about two million years ago. During the time that has passed the Darwin's finches have evolved into 15 recognized species differing in body size, beak shape, song and feeding behaviour.
Letter M is in between L and N. So like this LMN and o is in between N and P. So like this NOP. So technically the difference from o to m is just one of N.
True Magma is a Is heated up by the core and is hotter than lava
Answer: Affiliative behavior
Explanation:
Affiliative behavior is the behavior in which social interaction is seen between two animals through cohesion, meeting, hugging, involvement with each other, playful acts etc. They try to display emotional and social bond between them.
According to the question, chimpanzees displaying embracing behavior , ticking and little wresting shows that they have social and emotional link with each other.
Thus, they have affiliative behavior rather than aggressive and anger-based behavior.
