Q: If an atom gains electrons, it becomes what? Choices: - anion - a cation - neutral - an ion A:
an ion

(Question)
Q: Bacteria can be chemotrophs, which obtain what by breaking down chemical compounds in their environment? Choices: - waste - chemials - food - energy A:
(Answer)
energy

Ques: Q: Prescribed to treat allergies, antihistamines and corticosteroids help control what system that attacks allergens? Choices: - cardiovascular - reproductive system - nervous system - immune system A:
Ans: immune system

(Q).
Q: Examples of what process are evident in many biological systems because cells are surrounded by semipermeable membranes? Choices: - reproduction - photosynthesis - apoptosis - osmosis A:
(A).
osmosis

Ques:Q: Fission is a type of radioactivity in which large nuclei spontaneously break apart into what? Choices: - faster nuclei - light nuclei - active nuclei - smaller nuclei A:

Ans:smaller nuclei

Ques:Q: What is the term for how much matter is packed into a given space? Choices: - opacity - volume - mass - density A:

Ans:
density