Q: What encloses the border of animal cells? Choices: - Jacket membrane - dust membrane - cells membrane - plasma membrane A:
plasma membrane

Q: Intrusive igneous rocks cool from magma slowly in the crust and have large what? Choices: - pores - atoms - coal deposits - crystals A:
crystals

Q: Q: Because alkali metals are so reactive, they are found in nature only in ________ with other elements? Choices: - isolation - cooperation - competition - combination A:
A: combination

Question: Q: The simplest and smallest particle of matter that still has chemical properties of the element is called? Choices: - a molecule - a nucleus - an isotope - an atom A:
Answer: an atom

*Question*
Q: A solution is what type of mixture, where the dissolved particles are spread evenly through the mixture? Choices: - saline - gaseous - heterogeneous - homogeneous A:
**Answer**
homogeneous

(Q).
Q: Each lymph organ has a different job in what system? Choices: - circulatory - respiratory - nervous - immune A:
(A).
immune