Q: Which types of muscles cause bones to move when they retract?    Choices:  - working muscles  - active muscles  - bone muscles  - skeletal muscles  A:
skeletal muscles
Q: The denser regions of the electron cloud are called what?    Choices:  - cores  - lattices  - isotopes  - orbitals  A:
orbitals
Q: Q: What makes sunsets appear red?    Choices:  - wavelength scattering  - reflection scattering  - floral scattering  - rayleigh scattering  A:
A: rayleigh scattering
Question: Q: Bacteria break down the remains of digested food through a processed called what?    Choices:  - regulation  - oxidation  - synthesis  - fermentation  A:
Answer: fermentation
*Question*
Q: Unlike the cells of plants and fungi, animal cells lack what?    Choices:  - mitochondria  - flagella  - nuclei  - cell wall  A:
**Answer**
cell wall
(Question)
Q: Why does photosynthesis not occur in the deep-water zone?    Choices:  - it is cold  - it is pressurized  - it is stagnant  - it is dark  A:
(Answer)

it is dark