A researcher uses a new growth (chemically-defined) medium but that no bacteria grows regardless of which organisms are inoculated in it. What is not in the medium? Sucrose, Amino acids, carbon source or lipids (choose one only)

During an experiment, readings for blood pressure in a persons body were found to be constant . however , when he measured by a different blood pressure cuff , the readings differed by 15 points for each reading. this difference indicates that the results are

What's wrong with this ecological pyramid? (multiple choice)1. secondary consumers should be at the bottom of the pyramid2. the sun has an arrow leading to decomposers 3. primary consumers should come after the sun4. energy retained should increase from the bottom to the top5. the sun should be at the bottom of the pyramid

What tool do geneticists use to predict the outcome of genetic crosses? a. karyotype b. punnett square c. centrifuge