Ques: Q: What group of simple organisms recycles nutrients and has been on earth since long before multicellular life appeared? Read this paragraph and choose the correct option from the provided answers: 22.1 | Prokaryotic Diversity By the end of this section, you will be able to: Describe the evolutionary history of prokaryotes Discuss the distinguishing features of extremophiles Explain why it is difficult to culture prokaryotes Prokaryotes are ubiquitous. They cover every imaginable surface where there is sufficient moisture, and they live on and inside of other living things. In the typical human body, prokaryotic cells outnumber human body cells by about ten to one. They comprise the majority of living things in all ecosystems. Some prokaryotes thrive in environments that are inhospitable for most living things. Prokaryotes recycle nutrientsessential substances (such as carbon and nitrogen)and they drive the evolution of new ecosystems, some of which are natural and others man-made. Prokaryotes have been on Earth since long before multicellular life appeared. Choices: - bacteria - protists - eukaryotes - prokaryotes A:
Ans: prokaryotes

Ques: Q: The strength of acids is measured on what scale? Read this paragraph and choose the correct option from the provided answers: The strength of acids is measured on the pH scale. A pH value less than 7 indicates an acid, and the lower the number is, the stronger the acid. Choices: - Killalot - qcd - g - ph A:
Ans: ph

Ques: Q: The medieval catapult has a heavy ballast on one end and what on the other end? Read this paragraph and choose the correct option from the provided answers: Choices: - fragment - pivot - propellant - projectile A:
Ans: projectile

Ques: Q: Why do sodium and chloride ions attract each other? Read this paragraph and choose the correct option from the provided answers: Sodium and chloride ions have equal but opposite charges. Opposites attract, so sodium and chloride ions attract each other. They cling together in a strong ionic bond. You can see this in row 2 of Figure above . Brackets separate the ions in the diagram to show that the ions in the compound do not share electrons. You can see animations of sodium chloride forming at these URLs:. Choices: - sulfides attract - magnetism - like attracts like - opposites attract A:
Ans:
opposites attract