Which type of organisms do scientists think that all of life on Earth originated from?

stromatolites

single-cell eukaryotes

multicell animals

single-cell prokaryotes

Match the following terms and definitions 1. a sequence of sugars, phosphates, and nitrogenous organic bases nucleic acid 2. a complex molecule containing the genetic code DNA 3. a nucleic acid that participates in the synthesis of proteins RNA

A boundary between nonsedimentary and sedimentary rocks is an example of which type of unconformity?

Which statement describes events leading to formation of offspring in the conifer life cycle? a) A diploid sperm from pollen enters the female gametophyte and fuses with a diploid egg.

After using a meat slicer, you should:

The diagram shows two types of seeds. What fraction of the seeds are wrinkled?

The cell membrane is made up of what?

Won ... A scientist is conducting research on mealworms. Which of the following pieces of equipment should be used by the scientist to determine the mass of each mealworm? O A Graduated cylinder OB Ruler XOC Electronic balance 12 OD Beaker

If you want to get very high concentrations of cocaine to the brain very rapidly, which route of administration would you probably use?

The Galapagos Islands Have All The Same Species As Ecuador?

Which structure, If cut off, will hamper sexual reproduction in fungi? Answer choices: A. hyphae B. fruiting body C. rhizoids D. mycorrhizae