Q: What element is an essential part of many molecules needed by living organisms? Choices: - helium - silicon - hydrogen - nitrogen A:
nitrogen

Q: What type of device do scientist use to determine wind speed? Choices: - barometer - photometer - dynamometer - anemometer A:
anemometer

Q: Q: What type of work called occurs when a system pushes back the surroundings against a restraining pressure? Choices: - shape work - contrast work - retention work - expansion work A:
A: expansion work

Question: Q: What develops into embryos inside seeds, from which the next sporophyte generation grows? Choices: - secretions - buds - pupa - zygotes A:
Answer: zygotes

*Question*
Q: What term describes a region of space around an atom that has a non-zero probability for an electron with a particular energy? Choices: - orbital lobe - minimal orbital - related orbital - atomic orbital A:
**Answer**
atomic orbital

(Q).
Q: What organ participates in all digestive activities except ingestion and defecation? Choices: - small intestine - tongue - large intestine - stomach A:
(A).
stomach