An ultrasound uses sound waves to produce images of a baby.
Answer:
1. Abstain, Be faithful, or, as a last resort, use a Condom. Within a few years, Uganda had developed what researchers call a "social vaccine" against HIV: cultural norms about sexual responsibility, preached in clinics and public schools, as well as churches and mosques.
3.When used correctly every time you have sex, condoms are the best way to prevent sexually transmitted infections such as HIV. They have a very low failure rate and are effective for all forms of sex.
Explanation:
The earliest animals would have been invertebrates. Meaning they had no bones to fossilized in the first place and would have been mostly soft tissue supported by internal pressure or surrounding water pressure in the ocean.
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