Answer: burning of fossil fuels.
Explanation:
The correct answer is the trophoblast forms two distinct layers.
Under usual conditions, fertilization takes place in one of the fallopian tubes, then the fertilized egg starts to produce its path towards the uterus. By about the fifth day of conception, the embryo ultimately reaches the uterus and gets the implant in the uterine lining or endometrium.
During week II of implantation, the trophoblast layer gets involved by combining with the uterine wall, and during this time the layer of trophoblast differentiates and proliferates into two different layers, that is, cytotrophoblast and syncytiotrophoblast.
Answer: because i dont think rabbits will come out because its to hot and lots of people may be out so they might get scared
Explanation:
A Russian botanist and biochemist named Alexander Oparin came up with the idea that the first cells in existence might have formed from liquid droplet protocells. He assumes that the protocell can act naturally and form a container without membranes that is concentrated in chemicals