Q: The existence of the plasma membrane was identified in the 1890s, and its chemical components were identified in 1915. the principal components identified at that time were these? Choices: - gasses and proteins - carbohydrates and proteins - lipids and carbohydrates - lipids and proteins A:
lipids and proteins

Q: What type of matter transmits light without scattering it? Choices: - translucent - clean - bioluminescent - transparent A:
transparent

Q: Q: John dalton thought that what unit, which means "indivisible", could not be divided into smaller, simpler particles? Choices: - electron - nucleus - neutron - atom A:
A: atom

Question: Q: What occurs when there is little to no rain in a period of time? Choices: - pollution - hurricanes - floods - droughts A:
Answer: droughts

*Question*
Q: Skeletal, cardiac, and smooth are the three types of what cells and possess morphologies correlated with their functions? Choices: - cartilage tissue - organ - bone - muscle A:
**Answer**
muscle

Q: Some compounds containing hydrogen are members of an important class of substances known as what? Choices: - proteins - ions - bases - acids A:
acids