Q: Human evolution shows that evolutionary changes typically occur at what pace? Choices: - uneven - sudden - rapid - slow A:
slow

Q: What is the only metal that is liquid at room temperature? Choices: - hydrogen - gas - water - mercury A:
mercury

Q: Q: Biochemistry is the study of the chemistry of? Choices: - the Earth - inorganic matter - abiotic factors - living systems A:
A: living systems

Question: Q: Where is the potential energy of a river the highest at? Choices: - the middle - the ocean - the bank - the source A:
Answer: the source

*Question*
Q: The complement system is a series of proteins constitutively found in the what? Choices: - nucleus - organs - platelets - blood plasma A:
**Answer**
blood plasma

(Q).
Q: What works through chemical reactions that change the rock? Choices: - gradual weathering - chemical breakdown - rock weathering - chemical weathering A:
(A).
chemical weathering