Q: What is earth's main source of energy? Choices: - the atmosphere - the moon - the core - the sun A:
the sun

Q: Many disciplines within the study of biology contribute to understanding how past and present life evolved over time; these disciplines together contribute to building, updating, and maintaining this? Choices: - amount of life - root of life - forests of life - tree of life A:
tree of life

Q: Q: What is the distinctive shape of the molecule that contains genetic information? Choices: - cube - conical - cylindrical - spiral A:
A: spiral

Question: Q: What type of disease is caused by pathogens? Choices: - viral diseases - nervous diseases - autoimmune diseases - infectious diseases A:
Answer: infectious diseases

*Question*
Q: As an erythrocyte matures in the red bone marrow, it extrudes its nucleus and most of its other what? Choices: - electrons - moisture - energy - organelles A:
**Answer**
organelles

Q: What kind of charge does a neutron have? Choices: - positive - negative - static - neutral A:
neutral