The best and most correct answer among the choices provided by the question is the first choice "flu"
The flu<span> is an acute respiratory illness caused by </span>influenza<span> viruses A or B . Most people who get the </span>flu<span> recover completely in 1 to 2 weeks, but some people develop serious and potentially life-threatening medical complications, such as pneumonia.</span>
I hope my answer has come to your help. God bless and have a nice day ahead!
1.) The process of ejaculation starts with : A testis will produce sperm cells. These sperm cells will travel through the vans deferens. The accessory glands (seminal vesicle and prostate gland) will produce a fluid that will be combined to the sperm cells that will be semen.
2.) The process of menstruation starts with: An ovary will produce an egg cell every month that will travel through the fallopian tube and will go to the endometrium, the lining of the uterus. Since the egg cell is not fertilized, it will not be remained to the lining. Instead, the endometrium that has many blood vessels will shed blood containing the egg cell and that is the menstrual blood.
(Sorry for the wrong grammars)
Virus culturing because it allows you to take the virus and control it so can put it into a vaccine
Answer:
1) circulatory and respiratory
2) endocrine
3) circulatory
4) circulatory and nerves
Explanation:
I think these are right. Sorry if they are not.
