Q: Combining nonpolar olive oil and polar vinegar yields what type of mixture? Choices: - homogeneous - omnigeneous - amorphous - heterogeneous A:
heterogeneous

Q: Deletions remove one or more what from the dna? Choices: - codons - exons - genes - nucleotides A:
nucleotides

Q: Q: What can ultimately result when species are introduced to a new place and prey on other species? Choices: - depletion - over population - elimination - extinction A:
A: extinction

Question: Q: What are the outer-shell electrons of an atom called? Choices: - outer electrons - organism electrons - helium electrons - valence electrons A:
Answer: valence electrons

*Question*
Q: What is the name of the temporary organ that begins to form from the trophoblast layer of cells shortly after implantation? Choices: - uterus - embryo - appendix - placenta A:
**Answer**
placenta

(Q).
Q: Birds flying thousands of miles south in the winter, then returning to their homes in spring, is a familiar example of what? Choices: - hibernation - evacuation - emigration - migration A:
(A).
migration