Q: Iridescent green beetles, known as jewel beetles, change color because of the light-reflecting properties of the cells that make up this? Choices: - their hairs - their wings - their scales - their external skeleton A:
their external skeleton

(Question)
Q: What substances, which are distinct from acids and bases, form when ions form ionic bonds? Choices: - oils - vitamins - water molecules - salts A:
(Answer)
salts

Ques: Q: What is the term for a watertight seal between two adjacent animal cells? Choices: - cell membrane - cell wall - placental barrier - tight junction A:
Ans: tight junction

(Q).
Q: What is it called when currents keep reversing direction? Choices: - circle current - emitting current - stream current - alternating current A:
(A).
alternating current

Ques:Q: Chewing insects such as dragonflies and grasshoppers have how many sets of jaws? Choices: - one - four - three - two A:

Ans:two

Ques:Q: What is a sac-like organ at the end of the esophagus? Choices: - appendix - larynx - spleen - the stomach A:

Ans:
the stomach