Q: What kind of muscle is responsible for making the human heart beat? Choices: - deltoid - teres minor - respiratory muscle - cardiac muscle A:
cardiac muscle

Q: What is an atom or group of bonded atoms that has a positive or negative charge? Choices: - an photon - an electron - a neutron - an ion A:
an ion

Q: Q: Branching food chains and complex trophic interactions form what? Choices: - food fields - food maps - food trees - food webs A:
A: food webs

Question: Q: If the electromagnetic repulsion between protons is greater than the strong nuclear force of attraction between them, what do they become? Choices: - unstable , or experimental - slow , or radioactive - destroyed - unstable, or radioactive A:
Answer: unstable, or radioactive

*Question*
Q: Nitrogen is a very important element to living things, because it is part of nucleotides and amino acids that are the building blocks of nucleic acids and these? Choices: - cells - lipids - follicles - proteins A:
**Answer**
proteins

(Q).
Q: What color is the fungus in blue cheese? Choices: - green - purple - pink - blue A:
(A).
blue