Q: What causes reduction of elasticity in all organs? Choices: - low vitamin D - radiation - weight gain - age A:
age

Q: Mountain ranges, plateaus, and plains are features of what large landforms? Choices: - Countries - planets - States - continents A:
continents

Q: Q: What are membrane-bound organelles with their own dna called? Choices: - vacuoles - chromosomes - ribosomes - plastids A:
A: plastids

Question: Q: The number of electron pairs that hold two atoms together is called? Choices: - nuclear order - proton order - electron order - bond order A:
Answer: bond order

*Question*
Q: What is the force that pulls downward on an object and is measured by weight? Choices: - strength - work - light - gravity A:
**Answer**
gravity

*Question*
Q: Which theory is the idea that the characteristics of living organisms are controlled by genes, which are passed from parents to their offspring? Choices: - species theory - evolution theory - fossil theory - gene theory A:
**Answer**
gene theory