Q: What are formed by atoms gaining electrons? Choices: - ions - cations - oxides - anions A:
anions

(Question)
Q: What do scientists use to search other planets suitable for living? Choices: - optics - lasers - microscopes - telescopes A:
(Answer)
telescopes

Ques: Q: What is the skin of most reptiles covered with? Choices: - pores - cuticle - hairs - scales A:
Ans: scales

(Q).
Q: Where are bile acids, needed to emulsify lipids, stored in the body? Choices: - liver - womb - cerebellum - gallbladder A:
(A).
gallbladder

Ques:Q: Changing levels of what substances partly explain emotional ups and downs in teens? Choices: - nutrients - acids - enzymes - hormones A:

Ans:hormones

Q: Which theory states that the characteristics of living things are controlled by genes? Choices: - string theory - creationism - order theory - gene theory A:
gene theory