Q: What is a mixture of metal with one or more other elements? Choices: - an alkali metal - a halloid - a metalloid - an alloy A:
an alloy

Q: Anaerobic prokaryotes can live without what compound in their environment (it's a compound that people do need to live)? Choices: - carbon - Hydrogen - nitrogen - oxygen A:
oxygen

Q: What chemical element is required for a combustion reaction ? Choices: - carbon - helium - nitrogen - oxygen A:
oxygen

Q: What stimulates the production of milk by the mammary glands following childbirth? Choices: - progesterone - estrogen - melanin - prolactin A:
prolactin