Answer:
Fraternal - 2 egg cells
Identical - split of zygote
Explanation:
Fraternal twins are likely to be formed by 2 different egg cells being simultaneously sent by the ovaries and both of them being fertilized by the sperm cells. They are non-identical because the DNA of the 2 egg cells and the 2 sperm cells are different.
Identical twins are formed after a single egg cell has been fertilized by a single sperm cell, then split after the first division. This results in 2 genetically identical embryos because they were formed from the same fertilized egg.
Answer:
B
Explanation:
I'm pretty sure it's B, because I've had this same exact question yesterday. If it's not right, please don't be mad at me!
Answer:
Blood calcium levels.
Explanation:
Bone acts as the main connective tissue of the body. The bone provides the base for the attachment of the muscles and acts as the hard substance of the body.
Bone remodeling is the formation of the new bone tissue and the removal of the mature old bone. The bone helps in the bodily movement. They also regulates the phosphate and calcium level in the body as the main component of the bone is calcium.
Thus, the correct answer is option (D).
Answer:
A vaccine basically works by injecting a small amount of a virus into your body, and your body learns to fight the virus and becomes immune to the virus.
Explanation If it is 100% safe and effective, I will take the vaccine. The vaccine is stored at 2-8 degrees celcius. It can stay in the refrigerator for 72 countinuous hours. 172 countries are working on a vaccine. 5 are the US, China, Brazil, Italy, and Japan. The name of the vaccine is COVAX. Two doses are required, and it should be mandatory for high risk people as well as everyone else.
Answer:
Socialization
Explanation: Socialization is when people get into different groups to talk about their beliefs, values, behaviors, backgrounds, biology, and preferences.
