Q: Cells in a biofilm secrete what to recruit nearby cells? Choices: - signaling proteins - harnessing molecules - signaling neurons - signaling molecules A:
signaling molecules

Q: How are classic sedimentary rocks group? Choices: - particle depth - density - color - size of sediment A:
size of sediment

Q: Q: Pakicetus and rodhocetus are considered to be ancestors of modern what? Choices: - rodents - primates - hominins - whales A:
A: whales

Question: Q: Which layer is found below the lithosphere? Choices: - troposphere - magnetosphere - stratosphere - asthenosphere A:
Answer: asthenosphere

*Question*
Q: Where are the pharyngeal slits located? Choices: - nasal cavity - larynx - esophagus - pharynx A:
**Answer**
pharynx

(Q).
Q: The fossil record shows that this type of event is followed by the evolution of new species to fill the habitats where old species lived? Choices: - minor extinction - moderate extinction - formation extinction - mass extinction A:
(A).
mass extinction