The answer is an average couple is fertile for only 6-7 days. If a couple cannot produce healthy sperm and egg there are the various treatment to help infertile couples to become pregnant and can have their own child. Infertility happens if there is the failure to conceive consecutive 12 months despite the attempts.
Answer:
If you ate a cookie while you were upside down, your body would try it's best to bring the food to the stomach. There are other forces other than gravity that will help the cookie get to the stomach.
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Water affects the water to oil ratio and wind makes it travel.....
The answer is A "the first four steps of meiosis" because in mitosis the first stage is Prophase in which the chromsomes condense and centrioles move to opposite poles. And in Meiosis, the first stage is Prophase I in which the same thing occurs
Answer:
A polio antigen
Explanation:
<em>The substance in the polio vaccine that makes it effective in the mitigation of the disease is the polio antigen.</em>
<u>An antigen is any substance that is capable of eliciting an immune response in an individual through the production of antibodies.</u>
Antigens could be of two types;
- foreign or hetero antigens
- self or auto antigens
Foreign antigens are those whose sources are from outside of the body while self antigens are those within the body, a characteristic of people with auto-immune diseases.
The polio vaccine contains polio antigens which is an inactivated or weakened form of the pathogen responsible for causing the polio disease.
