Q: Each atom has a required number of what? Choices: - matrix bonds - accretion bonds - acceleration bonds - covalent bonds A:
covalent bonds

Q: Dna encodes instructions for what kind of molecules? Choices: - acids - cells - fats - proteins A:
proteins

Q: Q: Ancient greeks mistook what simple sedentary animals for plants? Choices: - parasites - fungi - corals - sponges A:
A: sponges

Question: Q: What is the name of the protein that is found in hairs and nails? Choices: - cellulose - chromatin - Skin - keratin A:
Answer: keratin

*Question*
Q: What kind of charge does a neutron have? Choices: - positive - negative - static - neutral A:
**Answer**
neutral

(Question)
Q: What are electromagnetic waves with the longest wavelengths called? Choices: - channel waves - sound waves - infrared waves - radio waves A:
(Answer)
radio waves