<span>The purpose is to prevent going into the negative zone. When you start paying with checks and you don't have money on your account that's the same as stealing things which means that you can get arrested for paying with checks while not having money. It's like fraud. Also, in case you're late with payments, you can get interest rates that don't suit you.</span>
Answer:
With nuclear fission, a large atomic nucleus (such as a uranium nucleus) breaks apart into smaller nuclei, and energy is released. With nuclear fusion, small atomic nuclei (such as hydrogen) join to become larger nuclei, and energy is released. Fusion of hydrogen releases much more energy than any other type of either fusion or fission. Note that the dividing line between heavy nuclei and light nuclei is the iron nucleus, which is at the perfect point of nuclear stability, so that neither fusion nor fission of iron nuclei would release any energy.
Answer: The correct statements are a, c, and e.
Explanation:
Oogenesis is the process by which ovum or female gamete is formed.
The process of oogenesis initiates in a female during her fetal stages. During embryonic stage, the oogonium (2n) or stem cells divide and mature into primary oocyte (2n) with the help of mitotic division.
Primary oocyte starts its meiotic division but gets arrested in prophase I stage before birth. After puberty, one oocyte resumes the division each month till menopause.
The primary oocyte completes the first meiotic division and produce secondary oocyte (n) and one polar body. The polar body is usually small in size and gets degenerated with time. It may or may not complete its meiosis II.
The first meiotic division is usually completed one day before ovulation (not just prior to ovulation).
Secondary oocyte is released during ovulation. It undergoes meiosis II but gets arrested in metaphase II. It does not complete its meiosis II until fertilized by a sperm.
Once, sperm penetrates the secondary oocyte, it resumes and completes its second division. It releases second polar body which also gets degenerated.
Thus, the correct statements are a, c, and e.