Q: Blood calcium levels are tightly regulated by the what system? Choices: - digestive - cardiovascular - nervous - endocrine A:
endocrine

Q: What is the basic unit of matter? Choices: - neutrons - calories - ions - atoms A:
atoms

Q: Q: How many types of glands does the dermis contain? Choices: - three - ten - six - two A:
A: two

Question: Q: Angiosperm success is a result of two novel structures that ensure reproductive success: flowers and this? Choices: - food - ants - glass - fruit A:
Answer: fruit

*Question*
Q: What is a measure of the size of sound waves? Choices: - voltage - wavelength - frequency - amplitude A:
**Answer**
amplitude

(Q).
Q: What is the term for rain consisting of water with a ph below 5? Choices: - carbon rain - produce rain - Hot Rain - acid rain A:
(A).
acid rain