Answer:
Chemical evolution is the formation of complex organic molecules from simpler inorganic molecules through chemical reactions in the oceans during the early history of the Earth.
It the first step in the development of life on this planet
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<span>A heterogeneous mixture has particles that are not uniformly distributed, but a homogeneous mixture has particles that are uniformly distributed.
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B) Density (keyword dense) is used to describe something thicker or more filled with. If you make a ball smaller aka decrease its mass and make it thicker aka volume It would make it a lot denser than before
In excreted urine, a reliable "marker" that a pregnancy has initiated is human chorionic gonadotropin (hCG).
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What is human chorionic gonadotropin?</h3>
- The trophoblast cells that surround a developing embryo.
- Eventually give rise to the placenta after implantation generate the hormone known as human chorionic gonadotropin, which helps women recognize pregnancy.
- Some pregnancy tests can detect the HCG's presence.
- The placenta secretes a hormone known as human chorionic gonadotropin throughout pregnancy (HCG).
- It tells the body to stop menstruation and makes the uterine lining thicker to support an embryo in development.
- After fertilization, HCG levels increase and stay elevated for another 10 weeks or more of pregnancy.
- As accurate as blood tests are urine testing.
- An individual is pregnant if their HCG level is high.
- An individual is not pregnant if a qualitative HCG test is negative.
- After a few days, a person should repeat the test if they still believe they are pregnant.
Learn more about human chorionic gonadotropin here:
brainly.com/question/28025179
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