Q: Do motile cilia usually occur in small or large numbers on the cell surface? Choices: - neither - mixed - small - large A:
large

Q: What is the force of attraction between a positive metal ion and valence electrons? Choices: - liquid bond - covalent bond - galactic bond - metallic bond A:
metallic bond

Q: Q: What phenomenon has severe consequences on both natural and man-made objects, including killing trees and degrading marble statues? Choices: - carbon rain - oxygen rain - natural rain - acid rain A:
A: acid rain

Question: Q: What type of input is not required during passive transport? Choices: - pressure - cooling - heating - energy A:
Answer: energy

*Question*
Q: What is the layer above the troposphere? Choices: - thermosphere - mesosphere - troposphere - stratosphere A:
**Answer**
stratosphere

(Question)
Q: How does the number of protons compare to the number of electrons in an electrically neutral atom? Choices: - they are half - they are double - they are triple - they are equal A:
(Answer)
they are equal