Answer the following question given this paragraph: Q: Cells in a biofilm secrete what to recruit nearby cells? Choices: - signaling proteins - harnessing molecules - signaling neurons - signaling molecules A:
signaling molecules
Answer the following question given this paragraph: Clastic sedimentary rocks are grouped by the size of the sediment they contain. Conglomerate and breccia are made of individual stones that have been cemented together. In conglomerate, the stones are rounded. In breccia, the stones are angular. Sandstone is made of sand-sized particles. Siltstone is made of smaller particles. Silt is smaller than sand but larger than clay. Shale has the smallest grain size. Shale is made mostly of clay-sized particles and hardened mud. Q: How are classic sedimentary rocks group? Choices: - particle depth - density - color - size of sediment A:
size of sediment
Q: Answer the following question given this paragraph: Pakicetus and Rodhocetus are considered to be ancestors of modern whales. Scientists still argue about how aquatic Pakicetus was, but Rodhocetus is considered to be a largely aquatic animal. Where is the nostril located on Pakicetus ?. Q: Pakicetus and rodhocetus are considered to be ancestors of modern what? Choices: - rodents - primates - hominins - whales A:
A: whales
Question: Answer the following question given this paragraph: The asthenosphere is below the lithosphere. The asthenosphere is also in the upper mantle. This layer is solid, but it can flow and bend. A solid that can flow is like silly putty. Q: Which layer is found below the lithosphere? Choices: - troposphere - magnetosphere - stratosphere - asthenosphere A:
Answer: asthenosphere
*Question*
Answer the following question given this paragraph: The pharyngeal slits are located in the pharynx. The pharynx is the tube that joins the mouth to the digestive and respiratory tracts. Q: Where are the pharyngeal slits located? Choices: - nasal cavity - larynx - esophagus - pharynx A:
**Answer**
pharynx
(Q).
Answer the following question given this paragraph: After each mass extinction, new species evolve to fill the habitats where old species lived. This is well documented in the fossil record. 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