Q: Which body part is unsuitable for animals living on land? Choices: - lungs - feet - hands - gills A:
gills

(Question)
Q: What are the most numerous and diverse biochemical compounds? Choices: - lipids - acids - vitamins - proteins A:
(Answer)
proteins

Ques: Q: What hormone controls milk production in mammary glands? Choices: - melanin - pepsin - dopamine - prolactin A:
Ans: prolactin

(Q).
Q: What is an atom or group of bonded atoms that has a positive or negative charge? Choices: - an photon - an electron - a neutron - an ion A:
(A).
an ion

Ques:Q: What type of fronts often bring sudden changes in the weather, including different types of precipitation, depending on the season? Choices: - stationary fronts - occluded fronts - warm fronts - cold fronts A:

Ans:cold fronts

Ques:Q: Minerals that are not pure elements are made of what? Choices: - isotopes - noble gases - metalloids - chemical compounds A:

Ans:
chemical compounds