Q: A few elements, called what, can conduct electricity, but not as well as metals? Choices: - synthetics - gases - halogens - metalloids A:
metalloids

Q: Most reptiles lay what kind of eggs? Choices: - hard-shelled - umbilical - roe - amniotic A:
amniotic

Q: Q: In the lungs, air is diverted into smaller and smaller passages called what? Choices: - ion channels - alveoli - ectoderm - bronchi A:
A: bronchi

Question: Q: Plant viruses can seriously disrupt crop growth and development, significantly affecting our what? Choices: - air supply - fuel supply - harvest supply - food supply A:
Answer: food supply

*Question*
Q: How many nonpolar bonds does an oxygen molecule have? Choices: - 5 - 7 - 3 - 2 A:
**Answer**
2

(Q).
Q: Hemoglobin, with four polypeptide chains or subunits, is the most frequently cited example of a protein having what kind of structure? Choices: - binary - unary - ternary - quaternary A:
(A).
quaternary