Q: The number of particles of a substance in a given volume is known as? Choices: - frequency - range - mass - concentration A:
concentration

Q: The magnet field of earth is called what? Choices: - atmosphere - troposphere - ionosphere - magnetosphere A:
magnetosphere

Q: Q: What types of glands do only female mammals have? Choices: - pituitary - thyroid - respiratory - mammary A:
A: mammary

Question: Q: What are species that are first to colonize a disturbed area called? Choices: - novel species - exploratory species - brave species - pioneer species A:
Answer: pioneer species

*Question*
Q: Mass can be destroyed to release what? Choices: - acceleration - mass - velocity - energy A:
**Answer**
energy

(Question)
Q: What is usually the prey of a protist? Choices: - pathogens - algae - proteins - bacteria A:
(Answer)
bacteria