Q: What process refers to the conversion of atmospheric nitrogen to ammonia? Choices: - biological nutrient fixation - biological ammonia fixation - biological respiratory fixation - biological nitrogen fixation A:
biological nitrogen fixation

Q: What forms when an atom gains electrons? Choices: - cations - bonds - crystals - anions A:
anions

Q: Q: The moon has a crust, mantle, and a? Choices: - ice cap - magnetic field - mountain range - core A:
A: core

Question: Q: What is the largest body in the solar system? Choices: - earth - asteroids - planet - sun A:
Answer: sun

*Question*
Q: "crossing over" occurs during what phase of mitosis? Choices: - Prophase ii - prophase VI - prophase iii - prophase i A:
**Answer**
prophase i

(Q).
Q: What shape are the eight sides of an octahedra? Choices: - rectangles - hexagon - square - triangles A:
(A).
triangles